将聚醚表面活性剂(P)、硫酸锌、多聚磷酸钠和葡萄糖酸钙复配,制成用于以欠饱和盐水(31%,NaClby mass)作钻井泥浆的缓蚀剂.研究了该缓蚀剂对钻具钢G105的缓蚀作用机理极化曲线和交流阻抗(EIS).测试表明,80℃时该缓蚀剂是阳极型缓蚀剂,成分之间有较好的协同作用,并以总浓度为200×10-6g.L-1时缓蚀效果最好;缓蚀率随时间增加而增大,缓蚀剂在电极表面形成膜的致密度在试验范围内随时间延长而增大.缓蚀剂的作用机理因其浓度改变而不同:低浓度下以几何覆盖效应为主,高浓度下则以成膜为主.
The inhibitive effect of compound inhibitor including emulsifier(P)、zinc sulfate、sodium polyphosphate、Glucose Gluconate was studied in 31% NaCl(bymass) solution.The inhibitory mechanism was analyzed by polarization curve and EIS.The results showed that the compound inhibitor was anodic-type inhibitor and its inhibitive effect on anodic and cathodal reaction was the most obvious at 200×10-6g·L-1.And the results of EIS revealed that the inhibition efficiency increased and the film formed on electrode surface was more and more compact with time.Inhibition mechanism was different with concentration of inhibitor.
[1]Zhao Guopeng(赵国鹏),Yu Xinwei(于欣伟).Be-haviours of steel G105 and electroless Ni-P alloy aboutchemical corrosive wear[J].Journal of Anshan Instituteof I.&S.Technolog(in Chinese),2000,23(2):81-84.
[2]Cao Chunan(曹楚南).Corrosion electrochemistry the-ory[M].Beijing:Chemical Industry Press,2004.237.
[3]Gu Tiren(顾惕人).Surface chemistry[M].Beijing:Science Press,2003.40.
[4]Xu Shouchang(徐寿昌).Industry cooling water treat-ment technology[M].Beijing:Chemical IndustryPress,1984.272.
[5]Zhao Wei(赵维),Xia Mingzh(夏明珠),Lei Wu(雷武),et al.Quantum chemistry studies of organo-phosphorus corrosion inhibitor[J].Journal of ChineseSociety for Corrosion and Protection(in Chinese),2002,22(4):217-220.
[6]Rajendran S,Apparao B V,Palaniswamy N.Corrosioninhibition by strainless complexes[J].Corrosion Sci-ence,2001,43:1345-1354.
[7]Rajendran S,Reenkala S M,Anthony N Palaniswamy.Synergistic corrosion inhibition by the sodium dodecyl-sulphate-Zn2+system[J].Corrosion Science,2002,44:2243-2252.
[8]Zheng Yiyun(郑逸云),Zhou Boqing(周柏青),LiQin(李芹).Present status and development of corro-sion inhibitors for water treatment[J].Corrosion Sci-ence and Technology Protection(in Chinese),2004,16(2):101-104.
[9]Kendig M,Mansfeld F,Tsai S.Determination of thelong term corrosion behavior of coated steel with a.c.impedance measurements[J].Corrosion Science,1983,23(4):317-329.
[10]Wang Jia(王佳),Cao Chunan(曹楚南),Lin Hai-chao(林海潮).Features of AC impedance of pittingcorroded electrodes during pits propagation[J].Jour-nal of Chinese Society for Corrosion and Protection(inChinese),1989;9(4):271-279.
[11]ZhaoYongtao(赵永韬),WuJianhua(吴建华),Wang Jia(王佳).Studies on the anti-corrosion be-havior of corrosion inhibitor to the ship building steel inmoist air[J].Electrochemistry(in Chinese),2001,7(4):472-479.
