四价钒离子对电镀锌钢板的防腐性能

IF 1.2 4区材料科学 Q4 ELECTROCHEMISTRY

Transactions of The Institute of Metal Finishing Pub Date : 2023-06-23 DOI:10.1080/00202967.2023.2225285

Takeshi Matsuda, Shinichi Furuya, Rie Kaneko, Koji Fushimi

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引用次数: 0

摘要

研究了四价钒离子对电镀锌钢板的防腐性能。将裸EG浸泡在NaCl溶液中，发现在溶液中加入硫酸钒会导致EG的开路电位向低电位转变，并在EG表面形成氧化钒。氧化层中不仅含有钒(III)氧化物，还含有少量的ZnO，说明EG表面的Zn被氧化，而钒(IV)种被还原为钒(III)种。附着钒(III)的EG的腐蚀电流密度比裸EG小一个数量级，表明通过抑制溶解氧的还原反应降低了锌的腐蚀。钒(IV)可以通过控制Zn氧化和钒(IV)还原的耦合作用，作为无铬涂层技术的自修复抑制剂。

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Corrosion protection behaviour of electrogalvanised steel sheet by tetravalent vanadium ion

The corrosion protection behaviour of electrogalvanised steel sheets (EG) by the tetravalent vanadium ion was investigated. Immersion of the bare EG in a NaCl solution revealed that the addition of vanadium(IV) oxide sulphate to the solution led to a transition of the open circuit potential to less noble and the formation of vanadium oxides on the EG surface. The oxide layer included not only vanadium(III) oxides but also a small amount of ZnO, indicating that Zn on the EG surface was oxidised while the vanadium(IV) species was reduced to the vanadium(III) species. The corrosion current density of the EG with the adhering vanadium(III) species was one order of magnitude smaller than that of the bare EG, clearly suggesting that zinc corrosion was reduced by suppressing the reduction reaction of dissolved oxygen. The vanadium(IV) species could be a candidate as a self-healing inhibitor for chromate-free coating technologies by controlling the coupling of Zn oxidation and vanadium(IV) reduction.

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来源期刊

Transactions of The Institute of Metal Finishing 工程技术-材料科学：膜

CiteScore

3.40

自引率

10.50%

发文量

审稿时长

3 months

期刊介绍： Transactions of the Institute of Metal Finishing provides international peer-reviewed coverage of all aspects of surface finishing and surface engineering, from fundamental research to in-service applications. The coverage is principally concerned with the application of surface engineering and coating technologies to enhance the properties of engineering components and assemblies. These techniques include electroplating and electroless plating and their pre- and post-treatments, thus embracing all cleaning pickling and chemical conversion processes, and also complementary processes such as anodising. Increasingly, other processes are becoming important particularly regarding surface profile, texture, opacity, contact integrity, etc.