Document YGpXy9aJ49LZe3RY8eGy96K5D

ft ju >. i Engineering Approach to a CHEMICAL PLANT COATING PROGRAM* (Parts 1 and 2 were published in the January issue) Part 3 --Some Coatings Systems and What Was Learned About Them Abstract Specifications of some of the coatings systems used at a seacoast chemical plant' are given. Some results accomplished with these coatings in the environment are described. Coatings include vinyls, epoxies, oil base, material*, zinc-silicones, aluminum metallising. S.4.* While the protective coating exposure of the Scadrift Plant is considered mild from a chemical manufacturing company standpoint, a major factor in the cor rosion control problem is its location in the hot, humid Gulf Coast area. have not l*<n properly prepared for coating ani spot repairs to the vinyl coatings w&och have been mechanically damaged. White Vinyl System 2A gives good protection wJ flat surfaces. The remarks under 1A concerning irregular surfaces apply to tins system. Remarks -wider IB generally apply to the 213 system. One color vinyl coat is ^ hot sprayed in order to build up the mil ^ thickness, gc-t good sharp edge build-up and the two final white coats are cold sprayed to get good coverage. IN ORIGINAL design of and later Some Experience with Vinyls in planning new construction of the Union Carbide Chemicals Company's Scadrift, Texas plant, specifications for several corrosion control systems were prepared. Among these the protective coating systems were planned to give long time protection to all exposed metal surfaces and at the same time to Statements concerning performance of generic materials in this article arc based on observation made on a limited number of manufacturers products. Formulation of these materials by other companies may show entirely different corrosion resistant qualities. evaluate different materials by field test. Careful application of the 1A Vinyl Specifications called for nearly all sur System gives good corrosion protection. faces to be 100 percent sand blasted. A It is. difficult for some applicators to schedule of these specifications is build the materials up to mils mini given in Table 1. mum thickness with three coats cold sprayed and the irregular surfaces which TABU 1--Coating Specifications Schodwlo need the most protection usually are Exterior Specifications t. Structure! Steel, Piping and Tanka A. t Coet Modified Vinyl Primer 2 Coals Vinyl 454 Mils Minimum Thicknesa B. 1 Coat Modified Vinyl Primer 2 Coats Vinyl Hot Sprayed not well covered. When the coating is applied less than the specified mil thickness, rust will ap pear on flat surfaces and sharp edges in a few month's time. 6 Mils Minimum Thicknesa C. 1 Coat Zinc Silicate Formulation . 1 Coal Modified Vinyl Primer. The IB Vinyl System is similar to IA except the vinyl coats are hot sprayed, 1 Coat Vinyl Hot Sprayed 6 Mils Minimum Thickness ' 2. Tanks White A. 1 Coat Vinyl Wash Primer I Coat Vinyl Intermediate 1 Coat Vinyl Grey f 1 Coat Vinyl White 454 Mils Minimum Thickness bringing the total thickness to a mini mum of 6 mils. Hot spraying tends to build up over rough surfaces and cor ners. The average spray man can make this application easily so when this sys tem is used corrosion problems for Uses for Epoxy Esters 3A and 3R F.poxv Kslpr system coated lank-* wit- un- < 11 pi -tcclcd on the flat sairlacrs. As with otucr sys tems, trouble occurcd on irregular sur faces in a lew months' time. Compared to other systems considerable chalking occured. Soane difficulty was experienced in making spot repairs due to the ma- . terial flaking off. Epoxy materials are being used lo an advantage where re sistance to solvents is needed. Alkyd Coating System 3C after three years' exposure to the weather is giving good service. The side exposed to pre vailing winds contaminated by alkalies from the water cooling tower is now beginning to fail. Oil Base 4A System gives very good service On interior surfaces free from moisture. This coating deteriorates rapidly in the Gulf Coast area climate when used below floor levels, under roof overhang and locations which are ex posed to moisture. Zinc SSicone Formulation System 5A has limited life expectancy in the . 140---400F range at the Seadrift Plant. Zinc SiScate System 6A appears to B. I Coet Modified Vinyl Primer 1 Coal Vinyl Hot Sprayed 2 Coats Vinyl White 6 Mils Minimum Thicknesi several years should be limited to touch ing up mechanical damage, field welds which were not properly cleaned, etc. have long life expectancy in the lower temperature range and after two years' exposure in 400F service seems very 3. Tanks Special Test A. 1 Coat Epoxy Ester Primer 2 Coats tpox Ester White 454 Mils Minimum Thickness ' B. 1 Coat Vinyl Wash Primer 2 Coats Epoxy Ester White 454 Mils Minimum Thickness C. Pickling and Phosphate Treatment for Steel Not Blasted . i Coat Oil Base Primer 2 Coats Alkyd Resin Formulations 4>4 Mils Minimum Thickness . A zinc silicate formulation on the sandblasted steel (System 1C) with vinyl overcoating offers the cheapest cost per square foot per year approach to a long range protective coating sys tem. Mechanical damage to the coatings is of little concern because the zinc pre vents the steel from rusting. Follow up cost should be limited for several years promising. System 7A in service at temperature ranging up to 1400F has proved satis factory. No flaking off of coating has occurred. Some discoloration caused by rusting due to pin holes or porosity has taken place. This is being corrected by light brush blasting and overcoating with a high temperature aluminum sili Interior Specifications to touching up field welds which may cone formulation seal coat. 4. Structural Steel, Piping and Tanks A. Prime Coat Oil Base Finish Coat Oil Base Hot Surfaces Specifications Part 4--Investigating Sandblasting and S. Temperatures 140F to 1000F A, One Coat Zinc Silicone Formulation 6. Temperatures HOP to S00F A. 254 Mil maximum thickness tine silicate Coating Application Hazards formulation sprayed on cold surface and treated or sprayed directly on hot surfaces with treatment not necessary. T. Temperatures to 1400F A- 3 to 5 mils hot sprayed aluminum metal xtensive experimenta E tion lias been carried out using several highly inflammable liquids and/ CWH 000006343 Abstract lising Stack to be coated should be preheated to 1S0F.I1S0F Sprayed with aluminum metallizing wire Coated with silicate of soda Baked at 4Q0F for four boura Presented under the title "Field Experience With Corrosion Rtilaltnl Coatings." by Newell D, Caadorph, Union Carbide Chemi cal* Corp., Fort Lsrau, Tmn, at the 16lh Annual Conference of the National Associa or gases trying to ignite them by sparks produced by sandblasting. An iron table (Figure i) with high backstop, forced liquid material feed bottles (Fig ure 2) and conventional sandblasting equipment were used in carrying out these tests. Tests are described in which art effort was mads to ignite gases Irom aalvenls commonly found in roaringi. In no caie was it yosjible to rgnile ihe eolventi with (he sand particles. Sandblast streams played cn burning solvents extinguished them. Means are described to prevent stndblaKing from causing damage to ad jacent xverationa and to reduce objec tions by asperating personnel to sandblast ing. J.*.J tion e{ Corrosion Engineers. Chicago, HI.. March lt-tt. Hit. (Continued cm Page 22) dll * t-:? *ih wi on JKj an in 22 CORROSION----- NATIONAL ASSOCIATION OF CORROSION ENGINEERS obL Vol. 16 Figure 1--Iren table with baekttep. farced liquid material feed bailie* end cenvcnrional landbloiting equipment eied In leits. Engineering Approach -- (Continued From Page 20) Tabic 1 shows several common ma terials some of which were used in the testing program. Acetaldehyde, kerosene and gasoline include in a representative way ex tremes of low ignition temperatures, low flash points, low boiling points, low ex plosive limits and wide explosive ranges. The series of tests listed below were carried out with these three materials. (Note: tabic top and back plate were preheated to vaporize kerosene.) With the sandblasting operation going on, liquids were fed into the air stream from the sandblast nozzle to the sur face of the steel being blasted and to the table top under the blast area. Blasting was carried out at right angles to the back plate, at a 45 degree angle slant ing up and rotated thru a 180 degree arc to a slanting down position. Ma terials used in these tests were never ignited by sandblasting. The next step in the test program was to wet the back plate and the table top with liquid, ignite and keep squirting material into the blaze until it was burn ing vigorously and then turn the sand blast unit on while still adding fuel. The blast'ng operation rapidly extinguished the Are wiiiie the liquid was still evapo rating and/or boiling. No re-ignition occured with any of the materials used. The large volume of expanding air from the nozzle makes it extremely un likely an explosive mixture concentra tion will be reached in the sand blasting area. This would indicate there is little jan^riiTworking where there'_mav be "small eas.leaks present. The particles material made incandes cent by frict:on (not hot enough to be seen in daylight) are very small and are carried by the expanding air flow until Figure 2--Oiogrom f forced materiel feed for landblasting hazards Inrestigolien. at the time they reach the surrounding atmosphere their temperature has drop ped below the point at which they will ignite any material. The experiment mentioned above, blasting with the nozzle slanted up with evaporating or boiling materials a few inches below further indicate the hot particles are light enough to be carried by the air flow. Any large particles of rust or scale which may be heavy enough to fall out of the air blast stream have so much volume the energy in the blast sand particles is not great enough to heat them to a dangerous tempera ture. . However, it should be emphasized that sandblasting should ney--1 raj-, ried out where flammable linuids ate rspiiled or leaking or large gas leaks are present. ~ A large semi-portable fan should be used to change the air where gas con centrations may occur. The area then should be checked with a flammable ma terial gas analyzer prior to sand blasting. Spray Painting Fire Hazards Most corrosion resistant coating for mulations will burn under proper con ditions. Table 1 gave the flash and igni tion point of representative materials. No solvents or coatings have lower flash, boiling or ignition points than ma terials listed or tested. Ignition and flash-back tests were carried out by spraying coating ma terials and solvents commonly used di rectly into a hot controlled kerosene fire. Regardless of material used no flash back or burning of sprayed mixture occured less than 24 inches from the spray gun head. The only time the flame approached the nozzle was when the material was sprayed on the surface between the burning kerosene and the spray nozzle. As the solvent evaporated flash-back SSSSSB TABIC 1-.-ChoraetarUtlc* ( Flammable Materials Used In Painting Defircee Explosive Limits % By Volume No. Material Flash Feint Ifin. Temp. Boll Point Lower Upper 1. Ethyl Ether.................................................. -- 350 05 1.0 48.0 3. Acetaldehyde.......................... ................. .. --30 365* 70 . 4.1 55.0 3. Kerosene........................................................ 100 too 301/574 0.7 6.0 4. Gasolene........................................................ --<5 530/300 100/400 1.4 7.0 6. Ethylene Oxide............. 0. Methyl Ethyl Kcytone............................ 0 30 eoi &60 51 >70 3.0 3-81 80.0 10.0 r. Acetone........................................................... 0 1000 131 3.0 12.0. figon 3--Trantporent pioiflc film vied to protect hilmmm. pneumatic motor velvet end other equip, men! from sandblasting dust. would occur, although at no time did the operator seem to be in danger. Only a very limited hazard exists when spraying near furnaces or hot lines provided s:mple precautions are taken. For example, in open or outside areas the operator should always spray down wind. Closed buildings or places where very little air movement is present should be ventilated or the air should be changed by portable fans to prevent possible explosive mixtures of solvents and air from occuring. _The spray nozzle rt`"'infl*d to.prevent static electrical discharges from the snrav hnarl tr> thn steel being coated. Equipment Damage From Sand Blasting The human element, aggravated by the nuisance value of having sand flying around and underfoot causes resistance to sandblasting out of proportion to actual damage it does. A realistic ap proach must be made to the operating people responsible for an area in which work is to be done. They must be sold on the idea an all-out effort will be made to keep sand or dust from settling on any type of equipment which may be damaged or have its operation affected. In doing touch up work sandblasting should be held to the minimum amount necessary to get good surface prepara tion. The amount of sand used can be reduced by equipping all blasting units with fast shut off type remote controls. To further reduce use of sand, vacuum feed type blasting guns should be used for all light work. Each day after blasting is finished all sand should be cleaned up and hauted away. Good housekeeping will reduce the nuisance and resistance to the work .will be much less. Instrument tubing and insulation adjacent to spots to be blasted can be protected by using old rubber inner tubes. Transparent plastic film (Figure 3) is ideal for sealing instruments, pneu matic motor valves and other equipment from sand or dust. Work should be planned to take ad vantage of wind direction. By careful timing work can be done on high col umns or structures with the sand and dust carried away by the wind where no damage will be done. Polyester film shrouds will cause the sand to drop straight down and prevent it spreading it over large areas. Motor driven centrifugal pumps and other rotating equipment can be ade quately protected by covering them with sisal kraft weather resistant paper. Under some conditions large semiportable fans- can be used to keep sand or dust away from equipment Again ad* (Continued on'Page 24)' CUH 000006344  --- ------------ --------------- . a.mi.j ' OH JX *. >.> Ull IK 1 (OUJ/ CORROSION----- NATIONAL ASSOCIATION OF CORROSION ENGINEERS . Vol.16 Trifluorochlorethylene- (Continued From Page 18) Rubber and Synthetic Linings Fluorocarbon Film Applications Fluorocarbon Alms can be readily heat sealed by thermal pulse or radio frequency techniques. Some possible applications of these resins include film for specialized pack aging. fuel cells (especially for oxi dants), cxpellent bladders, hose liners (especially for strong acids and oxi dants) and optically clear face shields, sight glasses, etc., where exposure to strong acids and oxidants is required. Fluorocarbon Grease Fluorocarbon grease is the product of several years' research directed to ward formulation of a true polyehlorotrifluoroethylene grease with outstand ing lubricity, chemical resistance and thermal stability. This material has shown good resistance to* attack' by' the reagents listed in Table 6. This grease has been used success- . fully as a lubricant for glass joints or stopcocks at temperatures from 150 to 170 C (300 to 340 F), and as a lubricant and sealent of bearings, valves, pack ings and shafts in equipment handling halogens, corrosive chemicals or strong acids. The fluorocarbon products discussed possess excellent chemical inertness, ' dimensional stability over a wide tem perature range and good mechanical properties. They have proven excellent and highly valuable to the chemical industry for coatings, lining; gaskets' and packings. TABLE 6 ltog<irti Resitted by Flvero-. earbon Crease Oxidizing Atsnti Hatoftens Fuming Nhrlc Acid Hydrogen Peroxide Oxygen Chromyl Chloride Chromyl Nitrate Potassium Permanganate Fluorine Chlorine Bromine iodine Monochlorlde Bromine Trifluoride Strong Acids and Miscellaneous Chemicals Corrosive Chemicals dc Solvents Give Good Sea Water Service* RUBBER AND Synthetic rubber lin ings have been in sea water service for 10 years with no visible change the compound. Synthetic fuel oil delivery hose normally lasts eight years or more. Generally, the hose must be replaced because of external abrasion rather than breaking down of the rubber. Hard rub ber pipe and fittings subjected to salt water and underground use have been in service for over 50 years. If rubber lining for steel is damaged or torn in service, the lining usually can be patched by the applicator and quickly returned to service. The price of lining, including steel preparations, is approximately $3.50 to $4 per square foot, based on flat sur faces. The price would be higher for more complicated shapes and tanks which would include a large number of steel bars, channels, supports, etc. In marine applications where salt water corrosion is a primary concern, the cost of lined steel and/or plastic pipe and.linings will be higher in installation cost than heavy gauge galvanized steel. Properly used, however, they are almost certain to give longer trouble free life than steel, pipe where corrosion is a factor. DISCUSSION Questions by A. V. Morrison, California Oil Company, Perth Amboy, New Jersey: 1. What has been your experience in coating pump impellers? Revision of a paper titled `'Controlling Ma rine Corrosion With Rubber and Plastics" by J. A. Thompson. American Hard Rubber Co., Netr York City, presented at the 16th Annual Conference, National Association of Corrosion Engineers. March 16-20, I860, Chicago. 111. 2. Would you favor a relatively hard coating such as epoxy or a relatively insoft coating such as plastisol or rubber? 3. A number of our vendors favor nat ural rubber rather than synthetic for sea water applications. Any comment? Reply by J. A. Thompsen: 1. Generally speaking, we mold hard rubber coating over a metal face on the impeller shaft end. This has been satis factory and in use for 15 or 20 years in pumps ranging from to 10 horsepower at speeds from 750 to 3400 rpm. On some applications where abrasion is in volved, soft rubber had been used satis factorily, but this is usually only at 1750 rpm speeds. 2. We believe that a hard rubber coat ing is the best all-around preparation. At high speed operation with abrasive conditions, we have coated hard rubber impellers and volute cases with epoxy or soft rubber lining in the relatively few applications over a period of about two years. These appear satisfactorily, but we do not have long term results. We do not use plastisol coating for im pellers based on problems of absorption and porosity. 3. We definitely favor natural rubber over synthetic rubber for sea water ap plications for reasons of moisture absorpt:on. Natural rubber compounds are usually considerably lower in moisture absorption than synthetic compounds, so that in a molded impeller the product is superior. In the case of hard rubber compound impellers, we -would favor natural rub ber over synthetic rubber because of lower moisture absorption and better adhesion of steel. Concentrated Sulfuric Acid Hydrogen Fluoride Hydrogen Chloride Chioroaulfonic Acid Antimony Trichloride Phosphorous Oxychloride Aluminum Chloride Ttifluoromethyl Hypofluorite Nitrogen Oryfluoride Nitroxyl Fluoride Aqueous Adds and Bases Alcohol Ether Hydrocarbon Solvents Chlorinated Hydrocarbons Fatty Add* Silanes Funnel Technical Topics Scheduled for March Oil-Soluble Inhibitor* (or Controlling Corrosion in Tankers and Pip* Lines, by W. S. Quimby Use of Polyester and Epoxy Restns (or Chemical Plant Repslra, by Walter A. Siymanskl Accelerated Corrosion in AluminumSilver Alloys, by H. H. Stadelmaicr and Z. M. Whitener Engineering Approach- (Continued From Page 22) vantage should be taken of the wind di rection In conjunction with fans. Figure 4 shows a 3 hp motor located in the sand blasting yard, connected to a small gear reducer drive unit by a falk coupling. Eccentric drive on the gear unit is connected to a reciprocating pump shaft type rod by a connecting rod. The shaft is sealed on one end by using seal type packing and the oppo site end is running through a brass sleeve with center section of sleeve as sembly being used as an oil reservoir. Sand shown around this installation accumulated in one week's time. Tho motor was run continuously and no effort was made to protect the assembly from the sand. An installation like this can be used very effectively when interested persons are invited to inspect it. They will be amazed by what they see. Motor, Cou pling and gear box are running along smoothly after weeks of exposure with no apparent damage. The shaft will have a highly polished appearance with very little evidence of wear. The motor, coupling and gear box can be protected adequately by placing something over the top and keeping it in place. The eccentric connecting rod and shaft should be completely en closed to keep them free of dust. Relationship of Microstructure and Stress Corrosion Cracking of Type 414 Stain less Steel, fay P, S. Trox*o and R. F. ' McCartney sondfitoiting reiiducs sic relatively hamlets Is rDtaltAQ equipment. References 1. Gasoline Resistant Tank Coalings, By W. W. Crammer., CORROSION,' Vol 8,- li'5-20<' <19S2) June. CUM 000006345 I l` I. I I i 1... I I II To CONTINENTAL OIL COMPANY PROPOSAL 24 > 1973 Attention: Larry N. West- Box 605 Westlake, La. 70669 Dear Sir: Having carefully examined Hie instructions to Bidders, all conditions of Contract form 4-13-l'U and the Basis of bids for painting piping and equipment. Block II, VCM Plant, Westlake, La. as well as the premises and the conditions affecting the work, the undersigned proposes to furnish ail necessary materials, labor, equipment, tools, transportation, services, etc., for completion of the work in accordance with above documents for the sum of: verify - e/y// Six Sixty romaes ts ff 8t 46 o.oo v If notified of the acceptance of this proposal within thirty ( 30 t days of the time set for receiving the bids, the undersigned agrees to execute a contract on the accompanying contract forms and the conditions thereof. The estimated number of calendar days to complete this project is ( ^O days. The undersigned is registered as a federal and state employer, with employer's registration numbers as follows: Federal 74 1536492 State 102956 ____, ryVery truly you MAILING ADDRESS: P. O.. Box 1527 Beaumont,. Texas 77004 ------------- V 1 --------;--------------------------Title President Cnmnanv . INDUSTRIAL COATLNGS CP fiWMC, ALTEP.NATES KBv*e* Alternate 1 ^A _ ire i- Corporation (Designate as Corporation, Partnership or Individual) w r> t Pt p V\ ^ II <r*0 <b) V e| e.k 1 * # ^7 2'o.oe <f 4. Lo.oc Alternate 11 Alternate III . , ^ 3- `M li i H C|. 0O OO C*) -j 3 7o.o g g 00*00 ^22 o.oo g O 0.0 0 A rc.ec Alternate IY 4- - U Cb) \\ .-O -t-dA r,z4i>'ae -7 t ? jfqg'Lt. 0.00 LUH <>oooa346 CERTIFICATION OF NONSEGREGATED FACILITIES The undersigned certifies to Continental oil Company and the ap propriate agencies of the United States government that it does not and vill not maintain or provide for its employees any segregated facilities at any of its establishments and that it does not and vill not permit its employees to perform their services at any location, under its con trol, where segregated facilities are maintained. The undersigned agrees that a breach of this certification is a violation of the Equal Opportu nity clause required by Executive Order 11246 of September 24, 1965. As used in this certification, the eludes facilities which are segregated by explicit direction or are in fact segregated on the basis of race, creed, color or national origin, because of habit, local custom or otherwise. The undersigned further agrees and understands that a breach of the assurances contained herein subjects it to the provisions of the Order of the Secretary of Labor at 41 CFR Chapter 60, dated May 28, 1968, and the provisions of the equal opportunity clause enumerated in contracts between the United States of America and Continental Oil Company, or in subcontracts held by Continental Oil Company from a third party or parties who contract with the United States of America. The undersigned further agrees that (except where it has obtained identical certifications from proposed subcontractors for specific time periods) it will obtain identical certifications from proposed subcontrac tors prior to the award of subcontracts exceeding $10,000 which are not exempt from the provisions.of the Equal Opportunity clause; that it will retain such certification in its files. (NOTE: Whoever knowingly and willfully makes any false, fictitous or fraudulent representation may be liable to criminal prosecution under 18 U.S.C. Section 1001.) This certification will be valid for the life of the contract covering Painting Piping and Equipment, Block II, VCM Plant __ at Lake Charles, La._______ with Continental Oil Company. Title Date L. W. Henslee P.rps-Lrignt. May 24, 1973 CUH 000006347 4.S5 Pc REV. a.1-68 TO* /I*71 FROM J0~ ?>Q 19i? /&&1 jt AM+\ ^ /Tbsil? ^2^4^ . JfVv fb*-jcJ*& S'ZU 2 ^xa-^ tA^^4- torfe S^-typO dh\ ,, 0/ fLAVXy^jL<.~JL(/ J^zyz? /_ y CWH 00000634,9 conoco Interoffice Communication To Larry West, VCM Plant, Lake Charles, Louisiana From Merle Hutchison, Maintenance Engineering, Ponca City Date October 23, 19 73 subject Napko Paint Epoxy 5802 As we discussed by telephone recently, we have obtained infra-red data on epoxy samples from Lake Charles and compared these with the control samples retained in Ponca City, Oklahoma. There was no significant difference in the Lake Charles and Napko 5800 converter samples. There is a significant difference between the Lake Charles and Ponca City Napko 5802 epoxy samples. Attached are the curves obtained from the samples submitted for analysis. We have contacted Napko and have discussed these results with Messrs. Frank Tvrdik and Fred Sharron. They agreed that the sample submitted from Lake Charles was off-specifications and were willing to work with Continental personnel to solve any problems that are encountered while using Napko materials. Merle Hutchison Coatings and Corrosion Specialist Corrosion and Metallurgy Division bak Enc CC: JDGrJFL CWW 000006349 ANALYSIS REPORT IRID Name SPECTROSCOPY GROUP Merle Hutchison Analysis No. 3-51949 thru 51954-3 Uample No.See Belov Notebook. No. IR Log #4 Spectrum, Film or Plate No. It,627, -628, -629, -631, -632, -635-73________________ Type of S tudy Requested: (a) ^Infrared, (b) Ultraviolet, (c) X-ray Diffraction (d) X-ray Fluorescence, (e) Atomic Absorption (f) Electron Microprobe, (g) Emission Spectroscopy Sample #1 #2 #3 #4 #5 #6 ___________________________ Description NAPKO 5800 Converter; Batch I8917 (Lake Charles) NAPKO 5802 Epoxycote; Batch 18482 (Lake Charles) NAPKO 5800 Converter (Ponca City) NA^KO 5802 Epoxycote (Ponca City) Mixture of one part #1 with two parts #2 Mixture of one part 3 with two parts #4 Fractions of the above six samples were dried to constant weight in a vacuum oven at 90C. The following results were obtained: Sample #1 #2 #3 #4 #5 #6 Wt % non-volatiles 76.4 79-6 75.6 69.5 78.0 75.1 The attached infrared spectra were completed for the non-volatile fractions from the six samples. These spectra and the wt % non-volatile data yielded the following conclusions: 1. There is no significant difference in the Lake Charles and Ponca City NAPKO 58OO Converter samples (samples #1 and #3). CUl-l Signed 'ffT&r Date 10/9/73 ANALYSIS] ;i'ORT Merle Hutchison Analysis No. 3-519^9 thru 5195^-3 irn"p 1 f No. See Belov Notebook No._____IR Log ':p<*ctruin, Film or Plate No. U-627, -628, -629, -631, -632, -635-3 iype of Study Requested: (a) Infrared, (b) Ultraviolet, (c) X-ray Diffraction (d) X-ray Fluorescence, (e) Atomic Absorption (f) Electron Microprobe, (g) Emission Spectroscopy 2. There is a significant difference between the Lake Charles and Ponca City NAPKO 5802 Epoxycote samples. This difference is shown by the lover % non-volatiles for the Ponca City sample. Since the IR spectra for both of the non-volatile fractions are experimentally identical, it was concluded that the Lake Charles Epoxycote contains less solvent than the Ponca City sample. 3. The IR spectra show no significant differences for the non-volatile fractions from samples #5 and H6. The apparent differences in the solvent content for sample t}2 as compared to sample H'h is reflected in the vt % non-volatile data for samples #5 and #6. Please contact me if you need additional information. CUH 00063S1 Signed Date_________ 1Q/9/T3