物理化学学报 >> 1997, Vol. 13 >> Issue (09): 802-807.doi: 10.3866/PKU.WHXB19970907

研究论文 上一篇    下一篇

苯并三氮唑对18-8钢应力腐蚀开裂的缓蚀作用

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:1996-12-09 修回日期:1997-03-31 发布日期:1997-09-15
  • 通讯作者: 牛林

Inhibitive Action of Benzotriazole for SCC of 18-8 Stainless Steel

Niu Lin,Lin Hai-Chao,Cao Chu-Nan,Song Guang-Ling   

  1. Institute of Corrosion and Protection of Metals,State Key Laboratory for Corrosion and Protection,The Academy of Sciences,Sehnyang 110015
  • Received:1996-12-09 Revised:1997-03-31 Published:1997-09-15
  • Contact: Niu Lin

摘要:

利用慢应变速率技术(SSRT),并结合电化学极化曲线和阻抗实验方法研究了苯并三氮唑(BTA)添加剂对1Cr18Ni9Ti奥氏体不锈钢在0.5mol•L-1HCl+0.5mol•L-1NaCl溶液中应力腐蚀和均匀腐蚀的缓蚀作用.结果表明,这种添加剂的缓蚀作用主要是抑制腐蚀的阳极过程而产生的.

关键词: 1Cr18Ni9Ti不锈钢, 应力腐蚀开裂敏感性, 缓蚀作用机理, 吸附, 阳极溶解

Abstract:

The SCC susceptibility of 1Cr18Ni9Ti austenitic stainless steel in 0.5 mol.L-1 HCl+0.5mol.L-1 NaCl solutions and the inhibiting effect of benzotriazole (BTA) for SCC and general corrosion were investigated by slow strain rate technique (SSRT), polarization measurements and electrochemical impedance spectroscopy. The results indicated that the inhibitive action of BTA can be attributed to its adsorption and inhibiting effects on the anodic reaction of metal dissolution due to the blocking of the active sites on metal surface.

Key words: 1Cr18Ni9Ti austenitic stainless steel, Stress corrosion cracking susceptibility, Inhibitive action mechanism;Adsorption, Anodic dessolution