金属学报  1987, Vol. 23 Issue (3): 228-233

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氢在奥氏体不锈钢应力腐蚀中的作用

乔利杰;褚武扬;肖纪美

北京钢铁学院;北京钢铁学院;北京钢铁学院

ROLE OF HYDROGEN IN STRESS CORROSION CRACKING OF AUSTENITIC STAINLESS STEEL IN BOILING MgCl_2 SOLUTION

QIAO Lijie; CHU Wuyang; XIAO Jimei (Beijing University of Iron and Steel Technology) (Manuscript received 11 April; 1985; revised manuscript 19 December; 1985)

乔利杰;褚武扬;肖纪美. 氢在奥氏体不锈钢应力腐蚀中的作用[J]. 金属学报, 1987, 23(3): 228-233.
, , . ROLE OF HYDROGEN IN STRESS CORROSION CRACKING OF AUSTENITIC STAINLESS STEEL IN BOILING MgCl_2 SOLUTION[J]. Acta Metall Sin, 1987, 23(3): 228-233.

摘要 参考文献 相关文章 Metrics 全文: PDF(1528 KB)   摘要: 321不锈钢在pH=1的42％MgCl_2沸腾溶液中长时间浸泡后,有32ppm的氢能进入试样,并导致29％的塑性损失,但并不能产生滞后断裂。在1NH_2SO_4溶液和沸腾(146℃)LiCl溶液中动态充氢表明,如进入试样的氢量低于某个临界值,则不会产生氢致开裂.熔盐动态充氢表明,只要进入试样的氢量超过临界值并能连续供氢,则无论是321钢还是310钢,即使在160℃也能产生氢致开裂.在LiCl溶液中阳极极化,则促进应力腐蚀;阴极极化,当电流低于临界值时则能抑制应力腐蚀,如高于临界值则导致氢致开裂,321钢和310钢的动态充氢(室温或160℃)门槛值均高于应力腐蚀门槛值,断口形貌也不同。 Abstract：The role of hydrogen in stress corrosion cracking (SCC)of austenitic stainless steels in boiling chloride solution was investigated. It was found that the threshold stress intensities for SCC of whether type 321 or 310 steel were much lower than that for hydrogen induced cracking (HIC) during dynamic charging at high fugacity at room temperature and 160℃,and the morphologies of SCC fracture surface differed from those of HIC. In addition, the anodic polarization promoted the SCC in boiling LiCl solution and the cathodic polarization with small current density retarded even restrained the SCC: These facts are important evidences cited as lending support to the anodic path dissolution of SCC of austenitic stainless steels in boiling chloride soluton. Hydrogen entering into the specimen via precorroding in boiling MgCl_2 solution with pH=1 for 200h was about 32 ppm, and it could cause elongation reduction but no HIC.The test in fused salt at 160℃ verified that HIC could occur if hydrogen enough and supplied continuously. However, there existed a critical hydrogen concentration during dynamic charging in 1N H_2SO_4 solution or in boiling LiCl solution, below which no HIC occurred. 收稿日期: 1987-03-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 乔利杰 褚武扬 肖纪美 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I3/228 1 褚武扬编著.氢损伤和滞后断裂,冶金工业出版社,1984,(即将出版) 2 姚京,褚武扬,肖纪美。金属学报,1984;20:A124 3 Wilde B E, Kim C D. Corrosion, 1972; 28: 350 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed