CORROSION BEHAVIOR OF HOT-DIP 55%Al-Zn ALLOYCOATING IN H2S-NaCl-H2O SYSTEM

J Chin Soc Corr Pro

2001, Vol. 21

Issue (5): 291-296 DOI:

Research Report

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CORROSION BEHAVIOR OF HOT-DIP 55%Al-Zn ALLOYCOATING IN H2S-NaCl-H2O SYSTEM

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华中科技大学能源与动力工程学院

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Abstract Fluxing in aqueous solution containing passivator a nd hot-dipping techniques were employed to prepare 55%Al-Zn alloy coating on car bon steel Q235.Effect of temperature，H2S content，NaCl concentration，pH valu e and immersion time on corrosion behavior of hot-dip 55%Al-Zn alloy coating in H2S-NaCl-H2O system were studied.Surface morphology of this coating before a nd after corrosion was observed.The corrosion mechanism of 55%Al-Zn alloy coatin g in H2S-NaCl-H2O system was illuminated.Results showed that 55%Al-Zn alloy coating had the same ability as galvanized coating to protect the steel，and was 2～3 times corrosion resistant than galvanized coating ,10～11 times corrosion resistant than carbon steel Q235.

Key words: hot dip 55%Al-Zn coating H2S-containing salt soluti on corrosion

Received: 14 August 2000

ZTFLH:

TG174.443

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. CORROSION BEHAVIOR OF HOT-DIP 55%Al-Zn ALLOYCOATING IN H2S-NaCl-H2O SYSTEM. J Chin Soc Corr Pro, 2001, 21(5): 291-296 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2001/V21/I5/291

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