800合金的碱性应力腐蚀破裂  Ⅱ.硫代硫酸盐的影响

中国腐蚀与防护学报

1998, Vol. 18

Issue (1): 7-13

研究报告

本期目录 | 过刊浏览

800合金的碱性应力腐蚀破裂 Ⅱ.硫代硫酸盐的影响

孔德生;杨武;赵国珍;黄德伦;张云柯;陈慎豪

曲阜师范学院;曲阜273100;原山东大学化学系研究生;机械工业部上海材料研究所;上海200437;机械工业部上海材料研究所;上海200437;机械工业部上海材料研究所;上海200437;机械工业部上海材料研究所;上海200437;山东大学化学系;济南250100

CAUSTIC STRESS CORROSION CRACKING OF ALLOY 800 PART Ⅱ. THE EFFECT OF THIOSULFATE

KONG De-sheng YANG Wu ZHAO Guo-zheng HUANG De-lun ZHANG Yun-ke CHEN Sheng-hao(Shanghai Research Institute of Materials; Shanghai 200437) (Dept. of Chemistry; Shandong University; Jinan 250100)

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摘要: 采用C形环试验研究了在沸腾50％NaOH+0.3％SiO_2溶液中添加Na_2S_2O_3对800合金SCC行为的影响,并结合电化学测量等进行了讨论。Na_2S_2O_3促进800合金在高温碱性溶液中的阳极溶解,使表面钝化膜稳定性下降,这主要归因于对Ni的阳极极化行为的影响;Na_2S_2O_3使800合金的碱性SCC敏感电位范围扩大,开裂速度增加,其中在-40mV(SCE)左右最为敏感。

关键词 ： 800合金, 碱性应力腐蚀破裂, C形环试验, 硫代硫酸盐, 阳极溶解

Abstract：The effect of additon of Na2S2O3 to boiling solution of 50%NaOH+0.3%SiO2 on SCC of Alloy 800 was investigated using C-ring tests along with anodic polarization measurements for Alloy 800, pure Cr, Ni and Fe. Na2S2O3 was found to stimulate the anodic dissolution and retard the passivation of Alloy 800. This was mainly attributed to the effect of S2O32- on the anodic polarization behavior of Ni. Addition of S2O32- gave rise to acceleration of caustic SCC of Alloy 800, and the maximum cracking rate was observed at ca. -40 mV (SCE).

Key words： Alloy 800 Caustic SCC C-ring test Thiosulfate Anodic dissolution

收稿日期: 1998-02-25

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孔德生;杨武;赵国珍;黄德伦;张云柯;陈慎豪. 800合金的碱性应力腐蚀破裂 Ⅱ.硫代硫酸盐的影响[J]. 中国腐蚀与防护学报, 1998, 18(1): 7-13.
. CAUSTIC STRESS CORROSION CRACKING OF ALLOY 800 PART Ⅱ. THE EFFECT OF THIOSULFATE. J Chin Soc Corr Pro, 1998, 18(1): 7-13.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1998/V18/I1/7

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