热镀锌重铬酸盐钝化毒性大、不环保.为解决此问题,研究了以无毒、无污染的铈盐取代剧毒重铬酸盐的钝化工艺,采用正交试验确定了热镀锌钢表面稀土转化膜的最佳成膜工艺参数,讨论了处理液组成、pH值、成膜温度及成膜时间等因素对稀土转化膜耐蚀性的影响,并采用中性盐雾试验(NSS)和极化曲线测定等方法评价了转化膜对热镀锌层的防护作用.结果表明,本工艺可以明显推迟热镀锌层出现白锈的时间;稀土转化膜同时抑制了热镀锌层腐蚀的阳极和阴极过程,腐蚀电流密度下降,极化电阻升高,显著改善了热镀锌层的耐蚀能力.
参考文献
| [1] | Eichinger E;Osbeme J;Cleave T V .Hexavalent chromium elimination:an aerospace industry progress report[J].Metal Finishing,1997,95(03):36-41. |
| [2] | Cheng Wang;Feng Jiang;Fuhui Wang .The characterization and corrosion resistance of cerium chemical conversion coatings for 304 stainless steel[J].Corrosion Science,2004(1):75-89. |
| [3] | 陈溯,陈晓帆,刘传烨,朱莉,孙际琪.铝合金表面稀土转化膜工艺研究[J].材料保护,2003(08):33-36. |
| [4] | Bethencourt M;Botana FJ;Cano MJ;Marcos M .Advanced generation of green conversion coatings for aluminium alloys[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2004(1/4):278-281. |
| [5] | Campestrini P.;Terryn H.;Hovestad A.;de Wit JHW. .Formation of a cerium-based conversion coating on AA2024: relationship with the microstructure[J].Surface & Coatings Technology,2004(3):365-381. |
| [6] | Hinton B R W;Wilson L .The corrosion inhibition of zinc with cerous chloride[J].Corrosion Science,1989,29(08):967-985. |
| [7] | Kunitsugu Aramaki .The inhibition effects of cation inhibitors on corrosion of zinc in aerated 0.5 M NaCl[J].Corrosion Science,2001(8):1573-1588. |
| [8] | Aramaki K .Treatment of zinc surface with cerium(Ⅲ)nitrate to prevent zinc corrosion in aerated 0.5M NaCl solution[J].Corrosion Science,2001,43(11):2201-2215. |
| [9] | Aramaki K .A self-healing protectivefilm prepared on zinc by treatment in a Ce(NO3)3 solution and modification with Ce(NO3)3[J].Corrosion Science,2005,47(05):1285-1298. |
| [10] | Roman L;Blidariu M;Cristescu C et al.Study of conversion coating on zinc deposition obtained from low pollution solutions[J].Transactions of the Institute of Metal Finishing,1997,75(05):171-174. |
| [11] | Motte C;Maury N;Olivier MG;Petitjean JP;Willem JF .Cerium treatments for temporary protection of electroplated steel[J].Surface & Coatings Technology,2005(7):2366-2375. |
| [12] | 关颖男;施大德.试验设计方法入门[M].北京:冶金工业出版社,1985:181. |
| [13] | LU Jin-tang,WU Hai-jiang,KONG Gang,CHE Chun-shan,XU Qiao-yu.Growth and corrosion behavior of rare earth film on hot-dip galvanized steel[J].中国有色金属学会会刊（英文版）,2006(06):1397-1401. |
| [14] | K. Aramaki .Inhibition effects of inorganic multivalent cations on iron corrosion in aerated sodium sulfate solution[J].Corrosion: The Journal of Science and Engineering,1999(2):157-165. |
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%