石油化工设备
石油化工設備
석유화공설비
PETRO-CHEMICAL EQUIPMENT
2014年
2期
5-9,10
,共6页
316L不锈钢%NaCl溶液%NaS·9H2O溶液%电化学性能%钝化膜%点蚀
316L不鏽鋼%NaCl溶液%NaS·9H2O溶液%電化學性能%鈍化膜%點蝕
316L불수강%NaCl용액%NaS·9H2O용액%전화학성능%둔화막%점식
316L stainless steel%NaCl solution%NaS·9H2O solution%electrochemical perform-ance%passivation film%pitting
采用动电位极化、交流阻抗和电容测量等方法，研究了316 L 不锈钢在不同浓度的 NaCl、NaS·9 H2 O 溶液中的电化学行为以及生成钝化膜的半导体性质。试验研究结果表明：①随着NaCl浓度的增加，316 L不锈钢点蚀电位及点蚀孔内溶液电阻下降很快，耐点蚀能力下降。随着NaCl浓度增加，316 L不锈钢生成半导体钝化膜困难，钝化膜结构由n、p 型转化为p 型，钝化膜杂质含量增加，耐点蚀能力下降。②随着NaS·9H2O 浓度的增加，316L 不锈钢点蚀电位以及点蚀孔内溶液电阻下降很快，耐点蚀能力下降。在不同浓度的NaS·9H2O 溶液中，316L 不锈钢生成的半导体钝化膜均为n、p 型，钝化膜杂质含量随着 NaS·9H2O 浓度的增加而增加，耐点蚀能力下降。
採用動電位極化、交流阻抗和電容測量等方法，研究瞭316 L 不鏽鋼在不同濃度的 NaCl、NaS·9 H2 O 溶液中的電化學行為以及生成鈍化膜的半導體性質。試驗研究結果錶明：①隨著NaCl濃度的增加，316 L不鏽鋼點蝕電位及點蝕孔內溶液電阻下降很快，耐點蝕能力下降。隨著NaCl濃度增加，316 L不鏽鋼生成半導體鈍化膜睏難，鈍化膜結構由n、p 型轉化為p 型，鈍化膜雜質含量增加，耐點蝕能力下降。②隨著NaS·9H2O 濃度的增加，316L 不鏽鋼點蝕電位以及點蝕孔內溶液電阻下降很快，耐點蝕能力下降。在不同濃度的NaS·9H2O 溶液中，316L 不鏽鋼生成的半導體鈍化膜均為n、p 型，鈍化膜雜質含量隨著 NaS·9H2O 濃度的增加而增加，耐點蝕能力下降。
채용동전위겁화、교류조항화전용측량등방법，연구료316 L 불수강재불동농도적 NaCl、NaS·9 H2 O 용액중적전화학행위이급생성둔화막적반도체성질。시험연구결과표명：①수착NaCl농도적증가，316 L불수강점식전위급점식공내용액전조하강흔쾌，내점식능력하강。수착NaCl농도증가，316 L불수강생성반도체둔화막곤난，둔화막결구유n、p 형전화위p 형，둔화막잡질함량증가，내점식능력하강。②수착NaS·9H2O 농도적증가，316L 불수강점식전위이급점식공내용액전조하강흔쾌，내점식능력하강。재불동농도적NaS·9H2O 용액중，316L 불수강생성적반도체둔화막균위n、p 형，둔화막잡질함량수착 NaS·9H2O 농도적증가이증가，내점식능력하강。
Using potentiodynamic polarization,AC impedance and capacitance measurement methods to study the electrochemical behavior and generate passive film semiconductor properties of 316L stainless steel in different concentrations of NaCl,NaS·9H2O solution.The results show that:as the increasing of NaCl concentration,stainless steel pitting,potential and pitting solution resistance decreased rapidly,pitting resistance decreased.It is difficult for 316L stainless steel to generate semiconductor passivation film with the increasing of NaCl concentration ,the structure of passivation film converted from model n,model p into model p,the impurities of the passivation film increased,and the resistance to pitting corrosion decreased;With the increasing of NaS·9H2O concentration,316L stainless steel pitting potential and pitting hole solution re-sistance decreased rapidly,pitting resistance decreased;in different concentrations of NaS·9 H2 O solution,316L stainless steel passivation film generated semiconductor model n and model p,the passivation film impurity increased as the increasing of NaS·9H2O concentration,resistance to pitting corrosion decreased.
