流动环境下316L不锈钢点蚀演化规律

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文献标志码：B

Evolution law pitting corrosion in 316L stainless steel under flow conditions

LIANG Xiaojuanla， KOU Linyuan'，WANG Guan 1，2 YU Jiachengla，MA Jinxiala，XU Yiquan 1a

（1.a.School Mechanical Engineering；b. CAE ， University，Yinchan 750O21，China；2.Liupanshan ，Yinchan 750021，China）

Abstract：To investigate the transient pitting corrosion evolution on 316L stainless steel under fluid flow， a numerical model is developed based on multiphysics coupling theory to describe the transient evolution pits in chloride-containing environments，systematically elucidating the influence fluid flow in corrosion kinetics. The results show that pit growth kinetics are governed by the synergistic interaction solution chemistry and electric fields. The mass transport corrosive species and multicomponent reactions is accelerated by fluid flow，resulting in asymmetric concentration and potential distributions that markedly accelerate the corrosion rate.

words： 316L stainless steel； pitting corrosion； fluid flow； ion transport； multiphysics coupling

0 引言

在金属腐蚀行为研究中，点蚀因其隐蔽性强、扩展速率快等特点，被认为是最具破坏性的局部腐蚀形式之一，极易引发突发性失效事故。（剩余6161字）