应用化学 ›› 1997, Vol. 0 ›› Issue (6): 57-59.

• 研究论文 • 上一篇    下一篇

丙炔醇对奥氏体不锈钢应力腐蚀的缓蚀作用

牛林, 林海潮, 曹楚南, 宋光铃   

  1. 中国科学院金属腐蚀与防护研究所, 金属腐蚀与防护国家重点实验室, 沈阳 110015
  • 收稿日期:1997-05-13 修回日期:1997-09-02 出版日期:1997-12-10 发布日期:1997-12-10
  • 基金资助:
    国家自然科学基金;

Inhibitive Action of Propargyl Alcohol for SCC of Austenitic Stainless Steel

Niu Lin, Lin Haichao, Cao Chunan, Song Guangling   

  1. Institute of Corrosion and Protection of Metals, State Key Laboratary for Corrosion and Protection, Chinese Academy of Sciences, Shenyang 110015
  • Received:1997-05-13 Revised:1997-09-02 Published:1997-12-10 Online:1997-12-10

摘要: 应力腐蚀开裂(SCC)是对金属材料危害最大的腐蚀形态之一. Frignani 等[1, 2]发现苯基硫脲、巯基苯并咪唑以及正癸胺+ KI 的混合物抑制了不锈钢的阳极溶解过程而有效地抑制AISI304 不锈钢的应力腐蚀开裂. 曹楚南等[3]研究了硫脲及其衍生物、伯胺以及季胺盐对 321不锈钢在酸性氯化物溶液中 SCC 的缓蚀作用, 并提出了缓蚀剂抑制腐蚀过程的阳极反应和阴极反应作用系数的概念. 结果表明, 缓蚀剂抑制阳极反应达两个数量级以上, 可以有效地抑制体系的SCC.本文利用慢应变速率技术并结合极化曲线和阻抗方法, 对 1Cr18Ni9Ti奥氏体不锈钢在酸性氯化物溶液中的应力腐蚀开裂敏感性以及相关的电化学参数进行了动态实时测量, 研究了丙炔醇(PA)对该体系应力腐蚀开裂的缓蚀作用。

关键词: 丙炔醇, 奥氏体不锈钢, 应力腐蚀, 缓蚀作用

Abstract: The SCC susceptibility of 1Cr18Ni9Ti austenitic stainless steel in 0.5 mol/L HCl+0.5 mol/L NaCl solution and the inhibiting effects of propargyl alcohol(PA)on SCC and general corrosion were investigated by slow strain rate tests(SSRT), polarization curves and electrochemical impedance spectroscopy(EIS). The results indicated that the inhibitive action of PA can be attributed to its adsorption and inhibiting effects on the anodic reaction of metal dissolution due to the effect of blocking the active sites on metal surface.

Key words: propargyl alcohol, austenitic stainless steel, stress corrosion, inhibitive action