表面铝含量对Q235钢电化学腐蚀性能的影响  

Influence of Aluminum Content in Aluminizing Layer on the Electrochemical Corrosion Properties of Q235 Steel

作　　者：丁志敏[1] 姜来金[1] 阎颖[1] 

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《材料保护》2007年第7期27-29,共3页Materials Protection

基　　金：辽宁省教育厅高校科研基金(2004D005);大连市科技计划项目(2005A10GX105)

摘　　要：用粉末渗铝技术在Q235钢表面上制备了不同铝含量的渗铝层,通过阳极极化曲线测试了渗铝试样在35g/LNaCl溶液中的电化学腐蚀性能。试验结果表明:不论铝含量如何,Q235钢在35g/LNaCl溶液中的阳极极化曲线上均表现为活化溶解,未出现钝化。试样的耐腐蚀能力随Q235钢表面铝含量的增加而增强;当表面铝含量低到2.6%(质量分数)时,即使表面未形成连续的渗铝层,其耐蚀性能仍高于不含铝试样;当表面铝含量为51.2%时,其耐蚀性能低于1Cr18Ni9Ti不锈钢,这与有关文献报道的含铝钢的耐蚀性能高于1Cr18Ni9Ti不锈钢的不同。Powder aluminizing technique was used to fabricate aluminizing layer on the surface of Q235 steel.The electrochemical corrosion properties of the surface-modified Q235 steel were evaluated via measurement of the anodic polarization curve in 35 g/L NaCl solution.The results showed that,irrespective the Al content in the aluminizing layers,the surface-modified steel specimens were still liable to activated dissolution and did not experience passivation.When the Al content was as low as 2.6%(mass fraction),the surface-modified steel still had better corrosion resistance than the unmodified steel,though in this case no complete aluminizing layer was formed on the steel substrate.When the Al content was 1.2%,the corresponding surface-modified steel had poorer corrosion resistance than 1Cr18Ni9Ti steel,which was different from what was reported in the literature.

关 键 词：Q235钢 渗铝 电化学 耐蚀性能 

分 类 号：TG174.36[金属学及工艺—金属表面处理]