Influence of thermal aging on sulfate-reducing bacteria (SRB)-influenced corrosion behaviour of 2205 duplex stainless steel
Influence of thermal aging on sulfate-reducing bacteria (SRB)-influenced corrosion behaviour of 2205 duplex stainless steel
复制标题
DOI：
10.1016/j.corsci.2008.03.009
复制
发表时间：
2008-07-01
影响因子：
8.3
通讯作者：
Raman, R.
中科院分区：
文献类型：
--
作者：
Antony, P. J.;Raman, R. K. Singh;Raman, R.
通过在含有硫酸盐还原菌(SRB)的氯化物介质中暴露40d，研究了热时效2205双相不锈钢的微生物腐蚀行为。以接触无菌介质的优惠券为对照。电化学研究表明，暴露于SRB的试片的腐蚀电位急剧下降，阳极电流增加。发现在SRB存在的情况下，奥氏体相被选择性地攻击。即使在热时效材料中发现了增强的奥氏体选择性腐蚀，但是在Sigma相附近存在活跃的腐蚀位置来保护奥氏体相。皇冠版权所有(C)2008由爱思唯尔有限公司出版。保留所有权利。
Microbiologically-influenced corrosion behaviour of thermally aged 2205 duplex stainless steel in comparison to the as-received material was studied by exposing the coupons for 40 days in chloride medium containing sulfate-reducing bacteria (SRB). Coupons exposed to the sterile medium were used as control. Electrochemical studies suggest a sharp drop in corrosion potential and increase in the anodic current for the coupons exposed to SRB. The austenite phase was found to be selectively attacked in presence of SRB for as-received material. Even though enhanced selective etching of austenite was noticed for thermally aged material, presence of actively corroding locations adjacent to the sigma-phase protect the austenite phase. Crown Copyright (c) 2008 Published by Elsevier Ltd. All rights reserved.