用电化学测量技术，对含F-和Cl-稀醋酸介质中316不 锈钢的腐蚀行为进行了研究.结果表明，316不锈钢在低浓度F-/Cl-稀醋酸溶液中能够钝 化，致密钝化膜为双层结构；F-能加速其均匀腐蚀，但加速作用不显著，浓度不同的含F -稀醋酸介质中均无点蚀.
The corrosion behavior of 316 stainless steel (316S S) in dilute acetic acid solutions containing fluoride/chloride ions was investi gated by using electrochemical measurement techniques.It was found that 316 coul d be passivated in 0.1 mol/L HAc solution mixed with 0.001 mol/L NaF and 0.001mo l/L NaCl or with 0～0.1 mol/L NaF.The well passivated films had an internal chro mium oxide rich layer and an external iron oxide rich layer.The results revealed that F- could increase corrosion rate slightly for 316SS in 0.1 mol/L HAc sol ution.No pitting corrosion occurred in the various tested solutions.The corrosio n rate of 316SS increased with increasing the temperature of solutions containin g F-/Cl- ions,but 316SS was still in the passive state at 80℃.
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