Document 6nOnmVBJoeMOm4v5Yn6o2LKg

ESSO CHEMICAL CANADA P.0 Box 3004, Sarnia. Ontario. Canada N7T 7M5 0950D SARNIA CHEMICAL PLANT W.D. REID Manager April 30, 1985 File: 1793 Esso CHEMICALS Certain-Teed Corporation Pipe & Plastics Group P.0. Box 253 Sulphur, Louisiana 70663 Re: Survey Results Corrosion in Recovery System Dear Mr. C. A. Gellner: Please find attached a copy of the survey results on: Corrosion in the Recovery System. In Summary: No. of Respondents: 25 Observations: Experienced Pit Corrosion In Settling Drum Stagnation Acidic Condition Temperature (>40 F) Iron Chlorides Corrosion Inhibitor Filter Solids Antioxidant Monitor For Pitting (72%) YES NO N/C 18 6 1 20 5 - 11 10 4 11 11 3 20 - 5 13 1 11 14 1 10 9 15 1 8 16 1 13 11 1 14 11 - Cont'd . . . /2 CTL020306 A Division of IMPERIAL OIL LIMITED 2- - Other general observations: (1) some of the respondents have had success in thwarting pit corrosion by using coatings (e.g. epoxy), glass-lined vessels and even electropolishing. None had any experience with using Titanium or equivalent materials; (2) I sensed a general confusion as to the difference between pit corrosion and chloride stress corrosion cracking. Therefore, some of the respondents who have indicated experience with pit corrosion may in fact be with C.S.C.C. Possibly the questionaire itself added to this difficulty, because the answers to a couple of other questions were also misleading. Any future survey questions should take this observation into account to make the results as meaningful as possible. As a final note, also find attached a blank copy of the survey questions that may help you when reviewing results as well as a copy of my presentation. Finally, I thank you on behalf of Esso Chemical Canada for your participation, and if you have any further questions or comments, please do not hesitate to contact me (519-339-2061). NP/db Attachments Best regards, ESSO CHEMICAL CANADA <n/t N. Pellarin P.V.C. Technical Supervisor CTL020307 Company Quest loot: 1. E*perleed Materials 3. Mat'l/CcalIngt Successful 1 2 34$ < 7 NO Vet Yet Yes " cs/ss is/ss CS cs/ss C-Cpoay ss/su C-AI Yet CS - Yet Yet CS SS - Clectro. No - - ). Sett I Inf OruM Ves Vet Yet 7ei Yet Yes No vet 4. Corrosion In Onr* No S. Stagnation flange (hr.| No 1. Condilions riilcKitll iw. I*M Chlorides (ppn) Iron (pp| t. Its In Carryover 7 Aid. - Vet 1. Other RulId-Up No Yet Vet Vet Yet Yet No *ts Vet u-) () HI m KO Mo - 4 4 7- 8 S *4 SO 10 (8 48 80 - - trace Yet Yes - - trace S Yet Yet NO trace trace NO - No Poly. No NO - - NO () NO SO 0.1 - t. Corrosion lh. U/S 10. filter Solids U/S No No II. Antloaldants U/S pH Change I?, f Itanium Vessel Experience ves 1st No 11. Pitting Monitor Method No - NO NO Yes Vet No Yet NO * " (ISM * " " Yet No VttS Yet H No No No No HO Vet Yet Yet Vet - t " lie) - - NO No NO No No No No Yet (ust Yet (US) let (US) NO - Yet (us) Yet - - 9 10 11 1? I) Yet No Yet Yet vet SS SS - SS - - C-Xynar SS Yet No Yet Vet Vet Yet No No Ves NO No No Vet No Yet - (I M (i*) i 4 No 1-3 40 40 - SO n Yet - Yes Vet - Yet Yet NO let Yet Vet 7 Yes Yes Ves - Vet NO Yet Vet (C) |C) NO No No ves Yes No Yet No - IM No MO Ko NO 7 so No Vet No No No No No No Yet NO Vet - . - (US) Holt? ISP >K US C P fl/PN U/S trtsodtwn phoiphitt - h/drogwlnonc - ottrasonlc - c ivtl l< * phtnol - radiography and pen. - upstream Iftf llqwldt 14 IS 14 i; : 19 30 31 33 .31 34 3S loins Yd Yes Vet vet SS CS SS CS CS/SS SS CS Yet No Yet Yet No Yet NO No No Vet id (U NO Tfl Yet Yes Yes SS Cl V3A (SS) SS (304) C-Cpoay Cl NUd Steel Vet Its Vet Vet Yes vet No Yes No No NO Ho NO Yes No Yet Yet Yet () . <) in ( Ho.) (-id NO ` AtSI SS No No (> MO * cs Yes NO Yes IM 1 . 100 - -Yet - NO 40-40 Yet Yet Yet Yet -. Yet 10 * NO MO Vet Yet Yet - N Vet .4 SS 8S --Yfl Vet Yes Yet NO Yes 7.S No too An*. IS Yet 31 Yet No NO NO NO No 3 3- 3 - SO An*. S I.S vet Vet 0.) - Yet Ho Vet Yet ret NO NO No No Ves 100 Vet Vcl ves ves NO No - NO Yet Vet Ho No NO No Yet Vet NO Vet -- MO Yet Yes No NO NO Yet * (C) - * * * No NO No NO No HO NO NO NO No No Yet Ves - No NO No NO NO l: 18 k: t N/C: 1 CS: S SS: 9 CS/SS: 3 Cl: 1 h/i. Coatings: 4 CS: 3 SS: ` Cl: 1 C lec tropol 1 thing: 1 N/C: 10 (IAS V: 30 N: S N/C: V: 8 H: IS N/C: 7 V: II n: 10 N/C: 4 flange: 1 hr. to 4 months lyp lc a 1: 8 - hr. AcldlCt II latkt II N/C: 1 flange: Mi. lo lOI'f 1: 1] Hi 1 H/C: II V: 14 N: 1 N/C: 10 V: IS N: 7 N/C: ) V: 13 N: 7 a/t: 4 v: 9 n: IS N/C: 1 V: 8 N: 14 N/C: 1 V: 1) * V: - N: H N/C: 1 N: ?S N/C: No No Vet Ytl - - (us) (us) No Ho Vet No - - (us) - No Yet No - /fi - NO v: 14 n: || n/C; - V: Hi - M/Cl CTL020308 VINYL CHLORIC SAFETY ASSOCIATION 1984 Vinyl Chloride Recovery System Corrosion Risk Management Survey 1. Have you experienced pit corrosion problems in the recovered monomer system? In what materials of construction. 2. What materials and/br coatings have you had success with? Problems with? 3. Do you use a settling drum system to remove water from recovered monomer? 4. Have you experienced pit corrosion in the settling drum? 5. Does the water sit stagnant for extended periods of time? How long? 6. Is the environment in drum acidic?pH? warm? ______ Ave. Temp. ? with Cl' present?ppm? with Fe present?ppm______ ? 7. Have you experienced resin carryover to the drum? 8. Have you experienced any other form of build-up? 9. Do you add corrosion inhibitors in or upstream of the drum? 10. Do you filter solids upstream of the drum? 11. Do you add antioxidants to the recovered monomer upstream of the water settling drum? Does this affect water pH? 12. Do you have experience *-k*' recovered monomer service? of tit^njinn in the 12a. Was it satisfac>:n*yC CTL020309 .../2 Vinyl Chloride Recovery System Corrosion Risk Management Survey (Continued) 12. Do you monitor equipment for pitting? With what method? (eg. radiography) YOUR RETURN ADDRESS FOR SURVEY REVIEW IF DESIRED. MAIL RESPONSES TO: 1746J/jrw M.L. Marson Esso Chemical Canada P.O. Box 3004 SARNIA, Ontario . N7T 7M5 CANADA Telephone: (519) 339-5944 CTL020310 CHEMICALS VINYL CHLORIDE SAFETY ASSOCIATION MEETING - 1984 SUBJECT: CORROSION IN RECOVERY SYSTEM SPEAKER: N. (Nino) Pellarin PVC Technical Supervisor Esso Chemical Canada CTL020311 CHEMICALS VINYL CHLORIDE SAFETY ASSOCIATION MEETING - 1984 CORROSION IN RECOVERY SYSTEM BACKGROUND: - TWO 316 SS INERTS DRUMS IN RECOVERED VCM OPERATION. UPSTREAM PIPING PRIMARILY CS. - DRUMS ARE EXPERIENCING PIT CORROSION. - PITTING IS REPAIRED BY LIGHT GRINDING AND WELDING. - CONCERNS: (1) INTEGRITY OF DRUMS: LEADS TO ENVIRONMENTAL RELEASE. (2) REPAIR TECHNIQUE: LEADS TO CSCC. CTL020312 CHEMICALS VINYL CHLORIDE SAFETY ASSOCIATION MEETING - 1984 CORROSION IN RECOVERY SYSTEM MECHANISM: - CORROSION PROTECTION FOR SS DRUMS PROVIDED BY OXIDE LAYER. - IRON CHLORIDES CHEMICALLY "BREAKDOWN" THE OXIDE FILM. - STAGNATION PREVENTS RE-PASSIVATION. - HYDROCHLORIC ACID ATTACKS THE UNPROTECTED SITE. - A PIT DEVELOPS. - PROPAGATION ASSISTED BY THE ELECTROCHEMICAL EFFECT. - FACTORS THAT ACCELERATE PROCESS: (1) ACIDITY (2) TEMPERATURE CTL020313 CHEMICALS CORROSION IN RECOVERY SYSTEM VINYL CHLORIDE SAFETY ASSOCIATION MEETING - 1984 FIG. 1: BREAKDOWN OF OXIDE FILM FIG. 2: FORMATION OF n!T< CTL020314 CHEMIC, VINYL CHLORIDE SAFETY ASSOCIATION MEETING - 1984 CORROSION IN RECOVERY SYSTEM CORRECTIVE ACTIONS:* - SHORT-TERM: PURCHASED GL VESSEL TO REPLACE MAIN SS DRUM. ONE DRUM OPERATION TO PREVENT STAGNATION. - LONG-TERM: CONSIDERING HAYS OF CONTROLLING OR ELIMINATING FACTORS. CTL020315 CHEMICALS VINYL CHLORIDE SAFETY ASSOCIATION MEETING - 1984 CORROSION IN RECOVERY SYSTEM SURVEY: 16 RESPONDENTS - OBSERVATIONS YES NO N/C EXPERIENCED PIT CORROSION (80S) IN SETTLING DRUM STAGNATION ACIDIC CONDITION TEMPERATURE * 40F IRON/CHLORIDES CORROSION INHIBITOR FILTER SOLIDS ANTIOXIDANT MONITOR FOR PITTING 13 3 7 72 6 82 6 82 14-2 8-8 78 1 4 11 1 87 1 11 4 1 NP/db 0277D CTL020316