690TT合金在高温含铅碱液中的腐蚀行为

中国腐蚀与防护学报

2010, Vol. 30

Issue (6): 427-432

研究报告

本期目录 | 过刊浏览

690TT合金在高温含铅碱液中的腐蚀行为

胡轶嵩,王俭秋,柯伟,韩恩厚

中国科学院金属研究所金属腐蚀与防护国家重点实验室沈阳 110016

CORROSION BEHAVIOR OF ALLOY 690TT IN HIGH TEMPERATURE LEAD-CONTAINING CAUSTIC SOLUTION

HU Yisong, WANG Jianqiu, KE Wei, HAN En-hou

State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

全文: PDF(2767 KB)

摘要: 室温条件下690TT合金的极化曲线表明，加入氧化铅能导致合金表面钝化膜不稳定。静态高压釜高温含铅碱液中的浸泡实验表明，在330℃的10% NaOH+10 g/L PbO含铅碱液中，690TT合金发生晶间腐蚀，试样失重，且试样表面越粗糙，腐蚀越严重。其中线切割样品由于残余应力和腐蚀产物楔入应力的综合作用，晶间腐蚀发展成为沿晶应力腐蚀开裂。在330℃的10% NaOH碱液中，690TT合金没有发生晶间腐蚀。

关键词 ： 690TT合金, 晶间腐蚀, 沿晶应力腐蚀开裂, 氧化膜

Abstract：A small amount of PbO could induce the passive film of alloy 690TT unstable in the caustic solutions at room temperature. The immersion tests were carried out in high temperature lead-containing caustic solutions in a static autoclave. The results showed that alloy 690TT immersed in 10% NaOH+10 g/L PbO solution suffered from intergranular attack (IGA) at 330℃, and the specimens lost weight. The coarser the original surface of the samples, the more serious the samples suffered from corrosion. IGA was observed and developed as intergranular stress corrosion (IGSCC) with respect of residual stress. While no IGA was found for the samples immersed in 10% NaOH solution at 330℃.

Key words： alloy 690TT intergranular attack (IGA) intergranular stress corrosion cracking (IGSCC) oxide film

收稿日期: 2009-09-29

ZTFLH:

TG172.9

基金资助:

国家重点基础研究发展规划项目（G2006CB605002）资助

通讯作者: 王俭秋 E-mail: jiqwang@imr.ac.cn

Corresponding author: WANG Jianqiu E-mail: jiqwang@imr.ac.cn

作者简介: 胡轶嵩，男，1977年生，博士生，研究方向为核电关键材料的耐蚀性能

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引用本文:

胡轶嵩,王俭秋,柯伟,韩恩厚. 690TT合金在高温含铅碱液中的腐蚀行为[J]. 中国腐蚀与防护学报, 2010, 30(6): 427-432.
HU Yi-Song. CORROSION BEHAVIOR OF ALLOY 690TT IN HIGH TEMPERATURE LEAD-CONTAINING CAUSTIC SOLUTION. J Chin Soc Corr Pro, 2010, 30(6): 427-432.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I6/427

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