Influence of the electrolysis mode on corrosion resistance of metallic coatings

Research has been carried out to determine the dependence of corrosion resistance of galvanic zinc and nickel coatings, formed from acid electrolytes with addition of lactic acid, on the electrolysis mode. It is shown that the galvanostatic mode of pulse electrolysis makes it possible to obtain coat...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 450; no. 3; pp. 32030 - 32033
Main Authors Yu Kireev, S, Perelygin, Yu P, Kireeva, S N
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2018
Subjects
Accelerated tests
Atomic force microscopes
Atomic force microscopy
Corrosion effects
Corrosion resistance
Corrosion tests
Electrolysis
Electrolytes
Lactic acid
Moisture resistance
Nickel coatings
Protective coatings
Sludge
Zinc coatings
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Summary:Research has been carried out to determine the dependence of corrosion resistance of galvanic zinc and nickel coatings, formed from acid electrolytes with addition of lactic acid, on the electrolysis mode. It is shown that the galvanostatic mode of pulse electrolysis makes it possible to obtain coatings having improved corrosion resistance in the moisture chamber and neutral salt spray. Corrosion resistance of coatings was assessed by changing of the transient electrical resistivity values before and after accelerated corrosion tests. Coatings formed using potentiostatic pulses of rectangular shape are of higher corrosion resistance, which is explained by the positive effect of pulse electrolysis modes on the morphological features of galvanic sludge, and is confirmed by the results of atomic force microscope (AFM) studies.
ISSN:1757-8981
1757-899X
1757-899X
DOI:10.1088/1757-899X/450/3/032030