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北京石油化工学院2026年研究生招生接收调剂公告
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huangguaha

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The specimens were loaded into the vessels in a manner designed to isolate the specimens from each other and from the autoclave. The autoclaves was lined with a loose thin sheet of PTFE and the C-ring specimens were stacked with 2mm PTFE sleeving wrapped around the coated parts of the specimen to act as a spacer. The pitting and crevice corrosion specimens were enclosed in individual perforated PTFE pockets. The autoclaves were pressure tested with nitrogen, then evacuated and refilled with nitrogen to 10 bar pressure five times to remove all traces of oxygen.

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huangguaha: 金币+100, 翻译EPI+1, ★★★★★最佳答案, 非常感谢 2014-10-29 14:21:37
将样品装入容器中,装入方式是使样品成彼此相互隔离,并与高压釜(壁)隔离。高压釜内衬一松散的聚四氟乙烯薄膜,C型环样品用2mm的聚四氟乙烯套管缠绕在样品的涂布部分充当隔离物,并层叠放置。点蚀和缝隙腐蚀样品封装在单个带孔的PTFE口袋。高压釜(先)用氮气测压,然后抽真空,并充入氮气至压力为10巴,共5次,以除去所有痕量的氧气。
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