Aspects on Early-Stage Corrosion of Different Zinc Alloys: Wet scCO2-Induced Corrosion-Reference-Cited by-同舟云学术

Aspects on Early-Stage Corrosion of Different Zinc Alloys: Wet scCO2-Induced Corrosion

Published:2020-09-08 Issue:1 Volume:77 Page:16-28
ISSN:0010-9312
Container-title:Corrosion
language:en
Short-container-title:

Author:

Saarimaa Ville¹,Kaleva Aaretti²,Levänen Erkki²,Väisänen Pasi³,Markkula Antti³

Affiliation:

1. Top Analytica, Ruukinkatu 4, FI-20540 Turku, Finland.

2. Material Science and Environmental Engineering, Tampere University, FI-33101 Tampere, Finland.

3. SSAB Europe, Harvialantie 420, FI-13300 Hämeenlinna, Finland.

Abstract

The surface activity of different zinc alloys was evaluated in wet scCO2. The zinc coating surface chemistry governed the corrosion product formation. On zinc and Zn-Al coatings, the Al2O3 layer prevented growth of corrosion products. A Zn-Al-Mg coating showed high initial reactivity due to active Zn-Mg phases. An electrogalvanized coating was very active due to a high ratio of exposed, less dense planes. In a Zn-Fe coating, several Zn-Fe phases were susceptible to wet scCO2 at the same time, triggering the sacrificial effect of Zn. Wet scCO2 is a convenient medium to assess the early-stage corrosion of metal coatings.

Publisher

NACE International

Subject

General Materials Science,General Chemical Engineering,General Chemistry

Link

http://meridian.allenpress.com/corrosion/article-pdf/77/1/16/2710532/3668.pdf

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