将磷化后的热镀锌钢板用钼酸盐后处理,以提高磷化膜的耐蚀性.用SEM、EDS、电化学极化测量和盐雾试验研究了钼酸盐后处理对磷化膜组成和耐蚀性的影响.结果表明,经钼酸盐处理后,磷化膜上磷酸锌晶体间的孔隙被钼酸盐膜填补,从而在锌层表面形成了由磷化膜和钼酸盐膜构成的连续完整致密的复合膜;复合膜的极化电阻Rp显著增大,腐蚀电流密度显著减小,耐蚀性大大增强.磷化300 s、后处理50 s时复合膜的耐蚀性最优,Rp比单磷化膜的增加了一个数量级.
参考文献
| [1] | Jegannathan S;Narayanan TSNS;Ravichandran K;Rajeswari S .Formation of zinc-zinc phosphate composite coatings by cathodic electrochemical treatment[J].Surface & Coatings Technology,2006(12/13):4117-4126. |
| [2] | O. I. Kropacheva;T. S. Devyatkina;N. A. Skornyakova .Deposition and Properties of Phosphate Coatings on Galvanized Steel[J].Protection of Metals,2003(4):325-328. |
| [3] | S. Jegannathan;T. S. N. Sankara Narayanan;K. Ravichandran;S. Rajeswari .Performance of zinc phosphate coatings obtained by cathodic electrochemical treatment in accelerated corrosion tests[J].Electrochimica Acta,2005(2):247-256. |
| [4] | Aramaki Kunitsugu .Inhibition effects of chromate-free,anion inhibitors on corrosion of zinc in aerated 0.5 M NaCl[J].Corrosion Science,2001,43(03):591-604. |
| [5] | LU Jin-tang;KONG Gang;CHEN Jin-hong .Growth and corrosion behavior of molybdate passivation film on hot dip galvanized steel[J].Transactions of Nonferrous Metals Society of China,2003(1):145-148. |
| [6] | Li GY.;Niu LY.;Lian JS.;Jiang ZH. .A black phosphate coating for C1008 steel[J].Surface & Coatings Technology,2004(2):215-221. |
| [7] | 林碧兰,孔纲,卢锦堂,车淳山,刘军.热镀锌层上磷酸锌转化膜的生长与耐蚀性[J].中国有色金属学报,2007(05):800-806. |
| [8] | Susac D;Sun X;Li RY;Wong KC;Wong PC;Mitchell KAR;Champaneria R .Microstructural effects on the initiation of zinc phosphate coatings on 2024-T3 aluminum alloy[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2004(1):45-59. |
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%