为了获得可提高热浸镀锌层耐蚀性能、对环境污染小的转化膜工艺,采用无毒偏钒酸盐对热浸镀锌层进行钝化,研究了转化液组成、pH值、钝化处理温度及时间对钝化成膜及膜层耐蚀性的影响,确定了最佳工艺:NaVO3 5 g/L,pH值为1.3,处理温度为室温(25～30℃),处理时间10～30 min.通过中性盐雾(NSS)试验、附着力测试和电化学极化测试考察膜层的性能,结果表明,采用该工艺可获得耐蚀性明显高于纯锌层的优良转化膜,且其附着力好,结合牢固.
参考文献
| [1] | 安成强,郝建军,牟世辉.镀锌钢板无铬钝化技术的发展[J].表面技术,2003(02):6-8. |
| [2] | Zhang X;van den Bos C;Sloof WG;Hovestad A;Terryn H;de Wit JHW .Comparison of the morphology and corrosion performance of Cr(VI)- and Cr(III)-based conversion coatings on zinc[J].Surface & Coatings Technology,2005(1):92-104. |
| [3] | Tencer M .Electrical conductivity of chromate conversion coating on electrodeposited zinc[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2006(23):8229-8234. |
| [4] | Wharton J A;Wilox G D;Baldwin K R .Electrochemical Evalution of Possible Non-Chromate Conversion Coating Treatments for Electrodeposited Zinc-nickel Alloys[J].Transactions of the Institute of Metal Finishing,1999,77(04):152-158. |
| [5] | Magalhaes AAO;Margarit ICP;Mattos OR .Molybdate conversion coatings on zinc surfaces[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2004(2):433-440. |
| [6] | Aramaki K .Preparation of Chromate-free,Self-healing Polymer Films Containing Sodium Silicate on Zinc Pre-treared in a Cerium(Ⅲ)Nitrate for Preventing Zinc Corrosion at Saratches in 0.5 M NaCl[J].Corrosion Science,2002,44(06):1375-1389. |
| [7] | 郭毅,鲁彦玲,杜仕国.镁合金表面稀土转化膜研究进展[J].表面技术,2009(04):63-65. |
| [8] | Arenas MA;de Damborenea JJ .Surface characterisation of cerium layers on galvanised steel[J].Surface & Coatings Technology,2004(2/3):320-325. |
| [9] | Aramaki K .A Self-healing Protective Film Prepared on Zinc by Treatment in a Ce(NO3)3[J].Corrosion Science,2005,47(05):1285-1298. |
| [10] | Umehara H.;Takaya M.;Terauchi S. .Chrome-free surface treatments for magnesium alloy[J].Surface & Coatings Technology,2003(0):666-669. |
| [11] | Chong KZ.;Shih TS. .Conversion-coating treatment for magnesium alloys by a permanganate-phosphate solution[J].Materials Chemistry and Physics,2003(1):191-200. |
| [12] | 冯强,郭瑞光,马建青,吉铮.钢铁表面钛盐化学转化膜研究[J].电镀与涂饰,2008(10):24-25,28. |
| [13] | 宇津木隆宏;大堀俊一;鈴木雅千 等.亞鉛めっきのクロムヮリ一化成処理技術[R].福島():ハィクプラザ,2003. |
| [14] | Yang KH;Ger MD;Hwu WH;Sung Y;Liu YC .Study of vanadium-based chemical conversion coating on the corrosion resistance of magnesium alloy[J].Materials Chemistry and Physics,2007(2/3):480-485. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%