Electrochemical investigations of the anticorrosive behaviour of the phosphated electrogalvanized steel additionally coated with conversion layer of cerium oxide

IF 0.5 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Chemija Pub Date : 2020-04-21 DOI:10.6001/chemija.v31i2.4219

O. Girčienė, L. Gudavičiūtė, A. Selskienė, A. Kirdeikiene, R. Ramanauskas

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引用次数: 1

Abstract

Center for Physical Sciences and Technology, 3 Saulėtekio Avenue, 10257, Vilnius, Lithuania The anticorrosive behaviour of the electrogalvanized carbon steel with PZn, PZnCa and PZnNi phosphate layers additionally coated with the conversion layers of cerium oxide in chloride-contaminated media has been studied. The composition and structure of investigated samples were characterized by scanning electron microscope SEM, while the corrosion behaviour was investigated applying voltammetric and electrochemical impedance spectroscopy EIS measurements. The data obtained have shown that all investigated samples additionally coated with cerium oxide conversion coatings exhibited better protective abilities. To summarize the results of electrochemical and SEM measurements it was stated that the most porous (F = ~1–2%) PZnNi/Ce coating exhibited the best protective abilities in a chloride-contaminated solution. Therefore, cerium ions are able to penetrate into the substrate, which is zinc coated steel, through the open pores of the PZnNi layer.

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涂覆氧化铈转化层的磷酸电镀锌钢防腐性能的电化学研究

研究了PZn、PZnCa和PZnNi磷酸层外加氧化铈转化层电镀锌碳钢在氯化物污染介质中的防腐性能。采用扫描电子显微镜(SEM)对样品的组成和结构进行了表征，并用伏安法和电化学阻抗谱(EIS)对腐蚀行为进行了研究。结果表明，在所研究的样品上加涂氧化铈转化涂层后，其保护性能均有所提高。综合电化学和扫描电镜测量结果表明，多孔度最高(F = ~ 1-2%)的PZnNi/Ce涂层在氯化物污染溶液中表现出最好的防护能力。因此，铈离子能够通过PZnNi层的开放孔渗透到镀锌钢的基体中。

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来源期刊

Chemija 化学-化学综合

CiteScore

1.30

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： Chemija publishes original research articles and reviews from all branches of modern chemistry, including physical, inorganic, analytical, organic, polymer chemistry, electrochemistry, and multidisciplinary approaches.