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ww $ ? l - ' ||* "f!f S'PPSSStcI LION OIL COMPANY DIVISION | Research Department, a El Dorado, Arkansas II' I # fj > f Interim Report on DEVELOPMENT OF FIRE RESISTANT ASFJLALT BASE MASTIC COATINGS 20$j_ Project No, 117 Report No, ^opy No. Distribution S, I!. Alexander - El Dorado G. H. Curtis/T. D. Burland - Houston R. D. Cunningham - El Dorado E. W. Gluesenkamp - Dayton C. A. Ilochwalt - St. Louis R. E. Koons - El Dorado M. S. Moody/C. E. McRae - El Dorado R. J. Schatz - Springfield R. If. Schlattman - Texas City J. II. Sheehan - El Dorado L. J. Spillane - El Dorado R. C. Tollman - El Dorado M. C. Throdahl/L. E. Klein/ . A. ileininger - St. 0. J. Weinkauff - St. Louis F. B. Zienty/T.-M. Patrick - St. Louis Central Technical File - St. Louis Research File - El Dorado Research Library - El Dorado Extra Extra Extra Extra Extra Louis # j i - i 4 * i i T * I | Work Started: - i ' ss v April 14, 1955 ` ? ; \ Period Covered: 4/14/55 to 5/1/59 tl i k%Mr 'Dafee^Submitted: January .6, ..i960. 1.11i it Personnel: PI V . ^ ^ II.' Alexander J.. Hoiberg /are j ' 1 3.y| |s. :: f 11-f' DSW 621941 STLCOPCB4095972 mi* - * =7 V * A f INTRODUCTION fit II. SUMMARY III. CONCLUSIONS IV. RECOMMENDATIONS V. PATENT STATUS VI . NOTEBOOK REFERENCES VII. EXPERIMENTAL - DESCRIPTION AND DISCUSSION OF THE WORK V .III. ECONOMIC EVALUATION IX. ACKNOWLEDGEMENT \. APPENDIX Table 1 - Fire Tests on Mastics at Various States of Cure Table 2 - Fire Tests on Mastics Containing Inorganic Salts Table 3 - Fire Tests on Mastics Containing Montars Nos. 3, 4, or 5 Table 4 - Fire Tests on Mastics Prepared with Chlorinated Solvent Thinners Table 5 - Moisture Vapor Transmission Constants Table 6 - Salt Spray Cabinet Test on Mastics Employing Inorganic Salts Table 7 - Bend, Cold Adhesion and Salt. Spray Tests on Montar Mastics Table S - Weatherometer Tests on Base Asphalt and Montar Blends with Base Asphalt Table 9 - Inspection Tests on Montar Samples Procedure I - Fire Testing of Asphaltic Coatings Procedure II - Modified Fire Testing Procedure . for ^Aspfraltip Coatings Procedure III Mffisture Vapor Transmission Test Procedure Procedure IV - Corrosion of Various Metals Test % - ?Lpw iTemperature . Performance 1 eel ITest " |Qi stel > 3 4 5 6 ** 0 10 11 12 13 It 10 1 - 43 24 45 46 O- ~/ (i DSW 621942 *. ; lift! STLCOPCB4095973 i -.41 > m: '* 4 i,7^ t$finf i<Mf J fJM I. INTRODUCTION This work was undertaken because there was an ever increasing consciousness of the need for fire resistance in mastic coatings. This included mastic coatings with many end uses, such as protective coatings for metals, moisture and vapor proof barriers over insulation and in roof construction. The Asphalt and Protec tive Coating Research and Development group received numerous reports of fires originating from bituminous mastics. Examples wore fires resulting from: (ll spraying the mastics on hot vessels (usually above 700*F); ( 2 1 dropping hot welding rods onto surfaces coated with uncured mastics. Also, it was known that conventional asphalt coatings in a cured state would contribute materially to a fire once ignited. Roofing asphalt was the main contributing fuel in the multi-mi11ion dollar loss suffered by General Motors at their Detroit automat ic transmission plant. It was becoming apparent that a mast ic coating's fire resistance would be an ever increasingly important factor governing its acceptability for use in industrial plants. Also, the fire resistance of mastic coatings used was beginning to affect insurance rat es. IP ^ IM; DSW 621943 w* r ___* - T f STLCOPCB4095974 fi tr.fr SUMMARY l- t f? Initial work on this project was directed toward develop ing a suitable test for fire resistance. In the second phase asphalt base mastics employing added material to make them more fire resistant were tested. Various inorganic salts and Montars (still bottoms from Aroclors) were the additives tested. Several experimental mastics were subjected to standard performance tests such as: (1) accelerated weathering; (2) salt spray protection; (31 low temperature adhesion; (4) corrosion of metals; and (5) moisture vapor transmission rate. Practically all the materials tested improved fire resis- tance However, eacli fire retarding,, agent also reduced the level of performance i n one or m__o__r_e orf* jthi.e_ a_r_e_a__s 1i i s_ ti.e_c i a. ibove. rIt*. .w. a, s,, . found that small variations in__ t_h__e_ percentages of solvent retained in t lie coating at t iae of fi re testing markedly affected the fire test results. yi'tt i rii p i f IP Ifc a 5v It P , .fe ` t t h r M DSW 621944 STLCOPCB4095975 STLCOPCB4095976 'v-,l I$ r? ? IfI IV. RECOMMENDATIONS -? ' i . ? i-m;? f-Vriftg* ~4- $ ? 'wife' Work should continue toward developing a formulation which is fire resistant and also has (he other necessary proper ties required in good protective coatings and moisture vapor barriers. The asphalts now available from the propane decarboni zation unit should be investigated to determine if they might have some special utility'in this application. A wider range of fire retarding agents should be investigated, including the new Pirun; compounds now available from the R h h division. f if f I1 DSW 621946 11 I iSsff list'll STLCOPCB4095977 STLCOPCB4095978 STLCOPCB4095979 b4f`Hfff| |lr f } z -i ; V < 3 -v v< VII, EXPERIMENTAL DESCRIPTION AMD DISCUSSION OF THE h'ORI' Fire Tests A number of tests were run to determine the effect of the state of cure on free burning time (burning time after test flame goes out) of Nokorode Seal bote and a Foster cutback mastic. A solids content of 7.0;7 appeared to be a critical point for both mastics. No free burning was experienced i r. either mas: ic when cured to a solids content greater than 97. O'' by wt . The results on these coatings and on a Foster clay emul sion are shown in Table 1. Several inorganic .-alts were added to : be basic Seal Mute mu In and fire tested. Most of these were tested .it t wu states cure. In each case a Seal : te control w.is run and : he i cduc t ion ; burning time given bv the experimental formal at ion w .5 record 1. ilium bicarbonate, al urn i tmm sulfate, ammonium .bospimte and borax tre some of the salts employe All were effect : ve in reducing .e free burning time. The use of these materials ; reduced coatings ' fair fire resistance at a s lids content of ' 2" by wt. This i s . Contrast to by wt . sol ids required c..i dole to rLtain free burning in the fire test. Detailed test results are shuwn . Table 2. Mastics of the basic Teal bote formula were ..repered using Montars 3, 4 and 5 in concent ret ions of 4 to 2-5 7 based on the asphalt content. Concentrations as dig;-, as 10/ were r.ot effective it: reduc ing flammability. All three Montars were effective at concent rat ions of 25.7. Test results are shown m Table 3. Mastics were prepared from 25/75 - Montar 4/nsphalt base using the Seal dote formula for fillers. Ti.e solvents employed were mixtures of 3CO/36O L.r. naphtha and three chlorinated solvents. The chlorinated solvents were chlorot liene, perchloroeihvlene and b'yan.lotte's C-L-2. Mastics in which as little as 2 0 I of the solvent was chlorinated showed measurable improvement in fire resistance. A solvent combination of 257 ; erchloroethyler.e, 57 7 C-I-2 and 25 7 3C0/360 naphtha produced a mastic which showed no free burning when tested iwath 10.2% of solvent remaining in the film. Test results on these chlorinated solvent blends are shown in 7a! le 4. Itiiij ismi.Jsi<$n riii *aHr ft employ, ng:.' " is eti a k\ DSW 621949 fl MH it STLCOPCB4095980 ifI s t Corrosion of Various Metals "Hi This test as outlined in procedure IV of the Appendix was run on Nokorode Seal Kote and a mastic of the same filler composition as Seal Kote but employing a base composed of 25/ Mon tar /4 and 7S'? Lion lS0/200 roofing asphalt. Neither mastic caused any of the three metals to corrode. tow temperature Performance Test This test as outlined in procedure V of the Appendix was run on the following coatings: (1) (2) (3) (4) lion Asbestos Roof Coating. Nokorode Seal Kote (medium grade). Roof Coating C-6-I (Project 2058, Monsanto Roofing Program). Mastic from 25^- Montar H4 and 7 5/ 1S0/200 roofing asphalt. None of the above four mastics showed any signs of failure in ihis test. Salt Spray Test Salt spray tests run according to the procedure outlined in procedure VI of the Appendix were run on six nasties containing inorganic salts and five mastics containing Montars. All the experimental blends gave poorer performance than di : Nokorode Seal Kote. Tiie results are tabulated in Tables 6 and ''on t hcrometer Tests Montars Kos. 3, 4 and 5 were blended with 177F softening po;.ot roofing asphalt in a ratio of 1/3 - Mont ar/aspbal t. Accelera te! weathering tests of 25 nil films of these materials and the base asphalt were made as described in procedure Yli of the Appendix. All the Montars had a* definite detr imental wea t herability of the asphalt. 3 Montar*'j?3 shleowed tise effect. The results are tabulated In Table 8. effect on the least deleterious Wiformit|l)!fWi t Mcfntai inf coc fdiEroi DSW 621950 STLCOPCB4095981 if' # I,> r. VIII. f - t $?, ECONOMIC EVALUATION i 7 Fire resistant coatings now available from competition are being specified by some companies in place of Nokorode Seal Note for certain applications. This is being done even though the cost of the competitive coating is triple that of Seal Kote. We face an almost certain loss of a considerable volume of business unless we add a fire resistant coating to our line. Its addition to our line should bring new business that we could not otherwise acquire. The emphasis on reduction of fire hazard in industrial plants makes coating cost a secondary consideration. Therefore, a fire resistant coating with a reasonable manufacturing cost can be marketed with a good margin of profit. ** r -i i? i: L i- DSW 621951 S'* * ' * i-' W- K z.' STLCOPCB4095982 STLCOPCB4095983 Cablie flli Fire Tests on Mastics at Various States of Cure (Test Method - Procedure I of Appendix) ft Plaque >'0 , % Solvent Duration in secs, test flame Seconds to flash Seconds to flame Duration of film burning Duration of free burning Con 8 Seal Kote (medium grade) 3.4< 1 70 90 110 350 180 Con 1 Ditto 8.6 170 75 80 400 230 Con 2 Ditto 10.0 18 5 00 r 100 380 205 Con 10 Ditto 3.7 190 85 00 2 30 40 Con 11 Ditto 2.8 ISO SO 0 ISO 0 Con 33 Ditto 6.7 170 90 100 oo 720 24 Foster Cutback Mastic 23 D itto 10 Ditto 16 Ditto 0 Foster Clay Emul sion Mastic 6.5 3.0 O - -/ 2.4 2.6 170 ISO 170 17S 170 00 2 30 1 3^ 120 170 100 V* - 390 y y y 220 0 0 0 0 no burnin: M i t: r* DSW 621954 STLCOPCB4095985 STLCOPCB4095986 STLCOPCB4095987 STLCOPCB4095988 STLCOPCB4095990 iff $ fill if; CO 1 CO O VO CO *C}- co co O CO r- (0 0 4> *-> h a 0 O O' O' \ Cl -T 1% vO <5 O' \ 1- O' \ CO r-i H O 0 -> *> (0 <4-1 O' O* *t C- co co co c C' G' Cr^O, 1'C' i ^ -i- co co n co tH co vO cx, c o 30 O' O' C' O' C' CO x*. d 0 u u0 0 fl> ti to 0a O t*`H 0 co CO O O CO ; a 4- c 00 co r- Cl 'O rH O CO rH . H t "O' CO 0 d rH rH Cl Cl rH co Hlx 3 O .3 </l f* 0 0) O 0u W H C +J <+* -H O n Q 0 0 if) f? 0 C CO 1 -H `O c* --r C j. u u 'O p-H co O' <0 <0 r 3 *--1 r- rH 0 0oo 1 --'O -r --' c G7 u O " 2 G U) i0 es me u +>*-< r: O co f -- CO r_j o> CO 0 c: r--1 1 r 1 - l 00 l - CO r- H ^ 4 rH r-H i-H r-H r--4 rH <~H r--1 30 rr* ,--- 0 'j X 0u O 0 *-> c r~. -- H O 5 a c OO O 0 O O O 0oo 0oo O O co O co O a3 Cl co O O' co co rH vO c i 1 -GO C 'O CO CO VO o c. w y rl r~~ *** a 3 #H rH r--1 -H rH rH H 33 f-H r-! o: g 0Q . 0w 0 <3 O O 05 M H <*-, O 0 CO O H-< CO Cl CO c G rH c o c O 1--1 0 0 f-- ooo IOvOvO O </; J) *o ?) E-* 'J 0 O H G1 -o 0 +j 0) +J -- 4-> 1-- G *--^ rH " ^ r-H '--' r-H V?. ^ XI r3 V<. r: 0 0 O -G H "i \. ,--. co ^ *5 ** cd 4J co 4-) H rH G. i--i G, C1 *w CO ^ '--^ r/j v--" G O O O d ) rH 4-) co -o- -o w CO T '--' Cl rH ____ h OO d +-> *-> co G cl rH '__- r3 Cm Cl rH w* O co G O n *u 0 OO O O 0 u: u (0 u 'J3 u w n 1rH --< -ir> c r: C H-* J CJ _cr^;| O G rH GU O -H HH h-> GG G OO W . 07 G0 H O - G - CJ c 0 O rj 3 '-Ojrjf rH rH hJ 1) 4-) 0 s^ 4JV 0 *-> *3 C O . CO 0 0 w O A c H c 0 X 0 0 rC. r* *H G O CO GW O rj ^c C c: r: n z t/i +> -*-> OO O r3 tH vH O f3 **H -r-* *- 5 m w io 2: -- a --. JPP >Z.-3 Q C > $ If; I; DSW 621960 i* i S* STLCOPCB4095991 STLCOPCB4095992 STLCOPCB4095993 STLCOPCB4095994 STLCOPCB4095995 Table 6 Sfe-V ii. mmm* * r _ _ _ Jage 23 i rtf! Salt Spray Cabinet Test on Mastics Employing Inorganic Salts(^) * Panel Composition 1 98^ Seal Rote, 2% aluminum sulfate Ditto Grade 90;t Seal Kote, 5"? am. phosphate, 5% sod. bicarbonate Ditto 5 2 90^? Seal Kote, Ditto 5^ al, sulfate,5^ sod.. bicarbonate 7 2 90/ Seal Kote, Ditto 5% am. phosphate, 51? al. sulfate 1 t Seal Kote, 5:- borax, 5 al. sulf ate, 2/ zinc oxide 5 10 Ditto b8^ Seal Kote, 5- borax, 5" sod. carbonate 2 ' zinc/ Ditto ' oxide Seal Kote D itto (l)n eference - "A Visual Rating System for Rusted Steel Speoinen;'1, ASTM Bulletin Ko. 154, October, 194b. s* I- > DSW 621965 STLCOPCB4095996 ' Table . - * 4 * *. " ./ Bend. Cold Adhesion and Salt Spray Tests on Montar Mastics i *s Composition Cold Bend Adhesion Test Test Salt Spray 500 hrs. Pescription Grade (1) Blend 1 70.5/S plastic cedent Passed Passed vehicle (38.755 solid 1 cracked, content) and 0.655 No sepa- solution of potas- ration, sium hydroxide & water. 12.955 7T asbestos S.25 spent clay 7.45 milled Montnr 4 Tanel 1 (Many rust) Tanel 2 ( spots ) 0.5 1.0 Blend 2 04.2.5 plastic cement vehicle (3S.75 solid content) 0.65 solu tion of potassium hydroxide. 16.9.5 7T asbestos 10.95 spent clay 7.45 milled Montar 5 Failed I'assed 2 cracked. Mo sepa ration. Panel 1 (Thoroughly) Panel 2 (rusted ) 0.5 0,0 Blend 2 - 99.5;' i'etrona te-I. 0 . S' Failed iassed 3 cracked 2 separated. Her 32 rust spots 0 Many dark spo ts on field of rust 0 Elend 6S5 plastic cement vehicle(3.75 solid content) 12;5 7T asbestos 2 5 spent clay125 Montar 5 (crushed) Passed Panel 1 32 rust spots 1 rust area 1.0 Panel 2 Over 34 rust spots, 5 rust areas 1.0 -i 6S5 Seal Kote vehicle (34.35 solid content) 125 7T asbestos 2.5 spent clay 125 Montar 5; (crushed) Passed Panel 1 12 small rust . jreas, rust dots avg. 12 to inr ] Panel 2 t small^ Ust i areas over 50 rust dots )) Seal LKotjet idil ; Passed j Passed i j!N.tuo??craaycik\isj I Nof sep&rr.ai I i it t 4 itaiilsfl IlfSi DSW 621966 STLCOPCB4095997 Page ^25; * fpM Table 8 f f V & ^ J; * ^ , ' '? , Weatherometer Tests bn Base Asphalt and it Montar Blends with Base Asphalt Cycle: 51 minutes continuous light, max. temp. 140* 5F. 9 minutes water spray and light. Water at 20 psi. and 45* 5'F. 24 hour runs. Composition Montar 3:25:5, 177 s.r. base 755 Montar 4:255, 177 s.r. base 755 Montar 5:255, 177 s.r. base 75? 177 S.P. base Light hours to failure 1 = 327.7 1 = 770.4 '70.4 1 = 1,291 1 = 2,225 If DSW 621967 Ss*: 1 # f'f 1 STLCOPCB4095998 STLCOPCB4095999 Procedure I ** # Fire Testing of Asphaltic Coatings (Subcommittee T-X, ASTM Committee C-16, October, 1955) This study represents results of initial trials for de vising test procedure to determine the relative fire resistance of films of asphaltic base coatings supported on insulation. The sug gestions during previous T-X meetings, March 3, 1955, -is reported in the minutes, were followed in regard to test panel preparation and in varying the solids content of the film to be tested. Coatings tested, with the exception of film of one panel, were supplied by the Benjamin Foster Company as Type Ii emulsion mastic and Type C cutback mastic. These are ident ified in Table No. 1 as E and CF respectively, CX of Test o represent ing a film from an addi tional cutback mastic. The test panels wore calcium silirate blocks with three pieces, each 1 1/'2T "It x 6" x 24", cemented together with "Frauset" and adhered to a transite panel with an asphaltic adhesive. The films were "doctor-bladcd" on the calcium silicate '.locks with guide bars, the cured film thickness being given in Table No. 1. ihe coated panels after film curing wore placed in a frnm.e constructed -f angle iron and supported on legs six inches above the base of the hood. Immediately before the flame test, strip's of film approximately 1/4" x 3" long were taken from near the edges for measurements of film thickness and content f solids. Testing was in a hood twenty-five incb.es wide with the window opening during panel testing approximately two inches to l ve approximately the same draft for all tests. bservations were m de through small side openings. To furnis the flame methyl alcohol was burned in a V-trough constructed of 18 gauge black iron with 2" x 2' ends, one side vertical and the three inch inclined side being diagonal across the end. The top opening was two inches wide and sixteen inches long, The trough, wa; located wiM the vertical siddee nex't t' o t`h` e f"il` m* and the top above the bottom edge of the film. by about one-half ihch uid with th-e outside e one-sixteenth inch away from the film to avoid heat conduction the metal. Preliminary trials indicated that the flame from methyl alcohol in the .trough would contact from 20 t.o 3^/ of the film area if the panel was tipped approximately 4 forward (1.78 " from vertical in 24"). Trial of varying amounts of methyl alcohol : ndicated that flame duration-of threejminutes was a severe condition and would indi- :a,te = rel S^nthet . 1 fi ifnifed tapee^ (|f f ilm The .alcohol, u ed mas |of t e.thario j [contend. M If i'1 i!ff I Miwatch wasJsta rte ) fa wa Mtoh ifrnlngji tfiin 'in jsj fg. STLCOPCB4096000  '* ^ -.15 f .-t. Procedure 5? r Modified Fire Testing Procedure for Asphaltic1 Coatings ?I Fanels were prepared according to metnod already described in procedure I. To facilitate handling and to increase the number of tests in the prescribed time or condition, the substrate was composed of Kaylo blocks 12n x 6" x 1". Fuel used for the test flame was sufficient methanol needed to produce a full flame for the duration of ISO seconds. 7n order that 20-305? of film area would be contacted by the test flame, panels were tilted at an angle of 4 toward the testing trough. Changes in quantity of fuel used were often necessary be cause of variations in circumambient temperatures and barometric pressures. The test troughs, in which the fuel was Mimed, were con structed of IS gauge black iron. The dimensions of the troughs were 4" x 2", one side vertical with the other side being 2 3/4" wide and .sloping at 45* angle from the top edge of trough at front to bottom edge of trough at back. In testing, the vertical side of this trough was placed 1/32" from the face and 1/2" above the bottom edge of the film being tested. Circumambient temperature, quantity of fuel, seconds to flash, seconds to flame, duration in seconds of test flame, duration in seconds of film burning and duration in seconds, when occurring, of free burning were the items recorded. t i M - f ' it * ? f ij J < s i* f' i * - ** t* DSW 621970 STLCOPCB4096001 fcedure^I f * III Moisture;Vapor Transmission Test '# T ? f r|| Preparation test sample tf- Ii m iy i Dextrin coated paper 6" x IS" was attached to Kaylo blocks (6" x 12" x 1"), coated side exposed. Tlie coating to be tested is nixed thoroughly and used to coat the dextrin paper. An even coating (3/32" wet measure) was obtained by using metal guide bars and striking off surface with a rigid screed bar. The material is dried at room temperature over night, removed from the Kaylo bloc!: and then placed in a force-draft oven to cure. Curing temperature - 1.10 - 1 50 " F Curing time - 7-10 days Three discs are cut from each sample. To v tain satisfactory discs, the top flanged rim of the individual cup was used as a template. After cutting, each disc is calipered for rhirkness. The average of six measurements was neeepted as `he t h ekness to 1 e use 1 mi sul-see,uent calculations. These discs are spark-tested ' eforr atta-. to diffusion cups. Three holidays cause rejec* i< j t ' f r w ise one or .wo holidays are sealed with paraffin wax. Testing Diffusion cups are coated inside w:'.. roof', ng grade asphalt and spark-tested - no Holidays are olernte!. .ipprox iraat ely hirty mils of a saturated .solution of sodium car on.i'e with 10-15 gms. solid sodium carbonate are placed .n he cup. ihe d.sc is then attached to the flanges of the cup. .in aluminum template of same area as the hot ton of the cups is `.entered on top of disc. hoi ten paraffin wax is usr- ' to edgeseal. is soon an wax solidifies, remove template. The pur: ns.- in using a template 1 ? to give a constant area for all specimens Leir.g tested. The prepared samples are ;1. force-draft oven maintained at 1C'F ; des tec; : r w a t.. l: After the system has had sufficient time to reach equili brium, weighings are recorded at intervals of seven days until a straight line curve is established. Calculations are made according to formula: 5 _ wt, loss (grams) x ave. thickness (-era. ) (\ x jYt P-4 (mm Iig) x time TiTrsTj * i l DSW 621971 STLCOPCB4096002 fI i Corrosion of Various Metals Tpst. MM i * ,* I'^s , I repared'panels of copper, aluminum and medium steel i.6 Sfction I]C* Preparation of Polished Panels, Instruction Sheet II, Refinery Products Group, Aug. 4, 1058). Imbedded duplicate sets of each metal in test mastic. Sixteen ounce containers used for each grouping, sealed and placed in 140F oven for seven days. Metals were then thoroughly cleaned and inspected. ' t if 4 3 4 l.J DSW 621972 STLCOPCB4096003 j&'l? *&*f If. u ,tf |1 'QCtitlnrB V FfTiin Low Temperature Performance Teo Sheet II, Refinery Product^Group?5 t0 Section TI> Instruction nsing guide bais^nd^screed^k measure were ra^de on panels Panels were cured at !40-F for ten days. Set aside for Panel s heated in 140 oven for 12 hours a cold box: nd placed in orought Brought Brought Brought to 0*F and held to -20-F and held to -40*F and held to -60-F and held for S for < ^ for 5 nuns' for 5 ...ins! eIvioidnentceermoinf adtiiosnbonodf inegirh15c inte^ rv^ panels were mg wcri i ng or cracking. AH hairline crackinspected for spark-tested to dete ks wiien appear- mine wi:ether breakthrough occurred. i14'tf *i \H i a6.! DSW 621973 it V V-"iW9 f fEWgf f|H STLCOPCB4096004 'Procedt h S> * .;* V Page 32 %# f ^ Salt Spray Protection Test ' Preparation of panels 1. Wet ground steel panels with 80-X belt on Porter-Cable power saw until surface was free of pits. 2. Brought to uniform surface by using 240-X belt. 3. clean rag. Wiped all material from surface of panels with soft 4. Gave panels two washings in 3OO-36O '.oiling range naphtha at a temp, of 130-lf0F. oxide paper. Hand sanded to mirror finish using ISO grit aluminum Washed in 240-315 "F boiling range nap!.LI.a holding panels with long tongs and wiping with surgical gauze. 7. Slushed panels in hot methanol (nearly boiling1. Flash dried and stored in desiccator until coating. 8. Coated with materials under Lest, making panels in triplicate. Coatings 2/3-" thick wet measure were o! mined by using steel guide bars and rigid screed. sealed enough 9. Panels thoroughly cured at 140'F, Spark-tested. panels by dipping edges in paraffin wax liquid, but not to blister finger. Edge hot 10. Placed in salt spray cabinet. Cabinet and mode of operation conforms to Method 4001.1 Protection, Salt spray tfogi. Time exposed 14 days. ! fI r ii $ I m 1i ill H Hit! IL if 11 it it DSW 621974 1Tifff f % STLCOPCB4096005  ^ : < ? * l '4 ^ Procedure VII P - $ Weatherometer Tests Preparation of panels Aluminum panels 5 7/S" x 2 3/4" x 0.032" + 0.002" are cleaned by dipping hot 206/360 naphtha and flash drying. Two pi'ocedures are followed, one for hot applied and the other for cold applied coatings. Hot applicd: Panels are attached to absorbent paper sheet 5" x 1$" x 0.003" with scotch tape so that bands l/2" at top and 1/4" at sides and bottom are masked. The materials to be tested are brought to the temperature which converts material to mobile liquid without oxidizing. Sufficient 1 iquid is poured onto mounted panel, resting on Atla.s trimmer bed, to insure complete coverage upon first pass under trimmer roll. Several passes are .inde in order t>.) produce a smooth film, free of holidays and conforming to the required ibi Panels are placed immediately from paper backing, scotch tape removed markinrs. in i-oolin; bath, stripped and then raven identifying Code markings which identify m.uerial being tested are placed, in upper left hand margin, while the panel number is placed in the upper right hand corner (operator facing coated surface of panel I . Panels are checked for thickness ..sing a desk micrometer and making three measurements ..n each sicie 1/d" in from margin of coating. une measure out of tolerance is .iccept abl e, two cause rejection of panel. before being subjectc! to weathering, panels are .spark-tested. ho holidays ..re tolerated. lold application: ianels are ale..:ied using used for hot application. The panels .urea m placing them end to end. Cuter eu :d i/2" ;es 1/4", using 3/4: itch tap e. same method pairs ~y inner ends Prepared panels are placed ir. recessed bars whose outer- guide edges have been built up with masking tape to insure a wet thickness of 3/32". /The materials to be tested are, troweled t >ntx> j |tol desileredprethpiacrkendesfpsarfla^ni >ar Lsr IHr-eMaP tthf^ n DSW 621975 tt STLCOPCB4096006 f P i l l" Afterrcuring the scotch tape is removed, panels sparktested, and then marked, for. identification in same manner as that used for hot applied test .panels.. Accelerated Weathering Specimens are subjected to weathering test as outlined in ASTM D 5^9-37T -- condition A. Visual inspections and spark-- testings are made according to recomraend.itions set forth bv Sub committee of D-6, ASTM. ' i? | * it i if i' . DSW 621976 STLCOPCB4096007