Document RpjJLv8ExmzKoeK7MjJ0k98z7

"- -'in ' -7 TfT-V'ST' ,4rt***1 &.3'&r?z ' - .;.eT- '' '- ' T -;;*.:ytj ;- . GENERAL ELECTRIC COMPANY, SCHENECTADY, N. Y. .''.-ji mF :4' ^ CORROSION TEST TO DETERMINE FYRANCL STABILITY . Apparatus .., - . . . . ........ y .. ' , . (1) 300 c.c. Erlenmeyer Flask (34/45 ground glass type) ' (2) Water oooled condenser (34/45 ground glass type) . (3) An accurately controlled bath so that the liquid under ' test Is maintained at 210C t 5C. 7 The General Electric Company uses a bath built to accommodate 4 determinations simultaneously. It consists of a rectangular box 31" long by 8* wide by 4" deep constructed out of Transits, Two General Electric 500 watt strip heaters 23-1/2" overall . length are located in the bottom center of the box and raised 1/4" from the bottom. On top of the two strip heaters is fastened a metal plate 19" long by 3-3/4" wide x 1/4" thick. The Erlenmeyers rest on this metal plate during the determin ations. A flat cover split lengthwise lies across the top of the box. Holes are cut in the cover to accommodate the flask necks. The holes are covered by flat Transits plates if not occupied by a flask. The heaters are controlled by means of a thermostat so that the Pyranol under test is maintained at 210C t 5C. Material ' (1) 200 c.c. of Pyranol under examination (2) Approximately 1 gram of aluminum foil (purity - 99.8?S and approximately 3 mile thick. Procedure All glass apparatus shall be chloride free when tested with a small amount of distilled water before drying for a minimum of 3 hours at 100C. (See K-6845480) Coil aluminum foil into a loose spiral so that no surfaces are touching. Handle with tweezers from now on. . Wash aluminum foil in acetone, distilled water, acetone, c.p. benzene, chloride free ethyl ether and dry 1/2 hour in ,100C oven. V."-*- . . ~ (Cont. on K-3984201-1) I 8/21/47 v 6/26/45 E. L. Raab E. L. Raab Date. *Prepared by--..S&AlljL, fW-'.W-A vrr DSW 330909 STLCOPCB4077553 ' Wfc- - . ----- GENERAL ELECTRIC COMPANY, SCHENECTADY, N. Y. #?'a ?***- *- j,Jy. ntto CCRRCSICN TEST TO DETERMINE PYRANOL STABILITY V Weigh foil to fourth decimal place and put into flask. Add . . Pyranol. Set condenser in place and shield all exposed glass ware from light. Start heat, _ / For Pyranols 147e, 1408, 1467, 1476, 1482, 1495 the temperature^ of the Pyranol under teat shall be maintained for 6 hburs at 2ioc t 5c. : . . . .. , : ; Remove the aluminum foil, wash, dry and weigh as indicated above. Express corrosion as percent change in weight. '- Record the Initial and final color, aoidity, condition and . chloride content of the Pyranol. Use method II-6845480 for ; - the chloride determination. ' - > - . ^ ' After corrosion color, acidity and chloride values should not / exceed the maximum values given below and the Pyranol should . be clear. ' , Pyranol Color(H-6871825) #1476 #1478 #1482 #1488 #1495 #1467 150 APH 200 APH 150 APH 200 APH 400 APH zoom Acidity(mg NaCH/g) .01 Free chlorides(ppm) 0.10 Condition Clear .01 0.10 Clear .01 0.10 ' Clear .01 0.10 Clear .01 0.10 Clear .01 2.0 Clear (Cont. from H-3984201) Rev. 8/20/47 Rev. 8/18/45 Date 5/25/38 E. L. Raab E. L. Raab Prepared by--?- W. Caird rw .?o-A t<' PITTSFIELD WORKS ENQiNEcame ocrr. LaD. Sect. 802 Sketch No. H-3984201-1 DSW 330910 STLCOPCB4077554