UG316L/25-22-2焊缝系统在H_2SO_4溶液中的腐蚀性能

中国腐蚀与防护学报

1992, Vol. 12

Issue (3): 263-268

研究报告

本期目录 | 过刊浏览

UG316L/25-22-2焊缝系统在H_2SO_4溶液中的腐蚀性能

李异;张士华

华南理工大学;华南理工大学

THE CORROSION BEHAVIOUR OF UG316L/25-22-2 WELD SYSTEM IN 1 mol/L H_2SO_4

Li Yi and Zhang Shihua (South China University of Technology)

全文: PDF(1468 KB)

摘要: <正> 一、前言尿素合成塔过去常用00Cr17Ni14Mo2(UG316L)钢作衬里材料,用316L型的焊条焊接,对该系统所产生的腐蚀问题,已做过许多工作。目前我国取得国际认可的制造尿素合成塔的厂家都采用UG316L不锈钢板作塔的衬里材料,使用BM310Mo-L焊条(简称25-22-2)焊接。这种焊缝有可能成为腐蚀的薄弱环节。因此,对UG316L/25-22-2焊缝系统腐蚀性能进行研究,找出其腐蚀规律,在理论上和生产上都是很有意义的。

Abstract：Corrosion behaviour of 316L/25-22-2 austenitic stainless steel weld system in deaerated 1 mol/L H_2SO_4 (30℃) solution was comprehensively studied by metallographical examination, electron probe microanalysis, and electrochemical method, including the measurement of corrosion at controlled-potential and potential distribution determination. Results of electrochemical research show that only slight general corrosion occurs for this weld system in the active potential region and in the active-passive transition potential region, as well as in the passive-transpassive transition potenteal region. The weld metal is subjected to the dentritical intergranular corrosion, and the base metal to the intergranular corrosion in the transpassive potential region. The nobler the etching potential in the transpassive potential region and the longer the etchion time, the greater the intergranular corrosion rate will be. The welding metal and the base metal display the same tendency of corrosion in the medium and no deterioration results from the galvanic corrosion between them. By metallographical examination and electron probe microanalysis, it is found that the precipitation of σ-phase exists at the grain boundary of the welding metal.

收稿日期: 1992-06-25

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引用本文:

李异;张士华. UG316L/25-22-2焊缝系统在H_2SO_4溶液中的腐蚀性能[J]. 中国腐蚀与防护学报, 1992, 12(3): 263-268.
. THE CORROSION BEHAVIOUR OF UG316L/25-22-2 WELD SYSTEM IN 1 mol/L H_2SO_4. J Chin Soc Corr Pro, 1992, 12(3): 263-268.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1992/V12/I3/263

[1] 化工部大型化肥装置腐蚀与与防护编写组,大氮肥腐蚀与防护,P68～72,(1980)
[2] 化工部化肥司:中荷尿素技术交流资料(1982)
[3] 吴剑等,中国腐蚀与防护学报,6(3) ,235(1986)
[4] 松本.厚孝顺(日),化工与通用机械;No.9,(1985)
[5] "Material Requirement for Modified 316L Stainless Steel for Urea Plants" Engineering Standard, Kellogg Continental B.V. Mar. ,(1979)
[6] 衷维章,中国腐蚀与防护学报.5(2) ,135(1985)

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