Effect of Scratch Size on Hydrogen Permeation Behavior of Zinc Coated Steel during Wet and Dry Corrosion Tests

The influence of scratch size on the hydrogen permeation behavior of Zn coated steel during wet and dry cycle corrosion tests was investigated electrochemically. A size controlled scratch was formed on Zn coated steels with a pulsed YAG laser machining technique. The hydrogen permeation current was...

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Bibliographic Details
Published inISIJ International Vol. 61; no. 4; pp. 1099 - 1103
Main Authors Sakairi, Masatoshi, Hashimoto, Takumi
Format Journal Article
LanguageEnglish
Published The Iron and Steel Institute of Japan 15.04.2021
Subjects
coated steel
hydrogen permeation
laser machining
scratch
wet and dry corrosion
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Summary:The influence of scratch size on the hydrogen permeation behavior of Zn coated steel during wet and dry cycle corrosion tests was investigated electrochemically. A size controlled scratch was formed on Zn coated steels with a pulsed YAG laser machining technique. The hydrogen permeation current was observed independent of formed scratch size. The periodic changes of the hydrogen permeation currents following the cyclic changes of the relative humidity were observed. After the tests, the red rust and zinc-hydroxychloride (simonkolleite) were observed at initially placement of NaCl solution. The total amount of permeated current did not proportionally increase with increasing the formed scratch area, indicating that the corrosion products played an important role in the hydrogen permeation behavior during wet and dry corrosion.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.ISIJINT-2020-259