Passivation of zinc coatings in cerium-containing solutions

被引：11
作者：
Abrashov, A. A. [1 ]
Grigoryan, N. S. [1 ]
Vagramyan, T. A. [1 ]
Zheludkova, E. A. [1 ]
Meshalkin, V. P. [2 ]
机构：
[1] Mendeleev Univ Chem Technol Russia, Miusskaya Pl 9, Moscow 125047, Russia
[2] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Leninskii Pr 47, Moscow 119991, Russia
来源：
RUSSIAN JOURNAL OF APPLIED CHEMISTRY | 2015年 / 88卷 / 10期
基金：
俄罗斯科学基金会;
关键词：
Cerium compounds - Chromate coatings - Chromates - Corrosion resistant coatings - Nitrates - Passivation - Steel corrosion - Zinc coatings;
D O I：
10.1134/S1070427215100067
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Process was developed for no-chromate passivation of zinc coatings in a solution containing 20-40 g L-1 of cerium nitrate, 5-25 mL L-1 H2O2, and 2-8 g L-1 of an additive (8-10 g L-1 of malic acid and 4-8 g L-1 of sodium nitrate) at a temperature of 40-60A degrees C and pH 2.5-3.5. It was shown that cerium-containing passivating coatings on zinc-plated steel articles compare well in corrosion resistance and protecting capacity with iridescent chromate coatings. It was found that cerium-containing coatings are capable of self-healing and sustain a thermal shock without degradation of their characteristics.
引用
收藏
页码：1594 / 1598
页数：5
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