Effects of organic acid pickling on the corrosion resistance of magnesium alloy AZ31 sheet

Ugochukwu Chibuzoh Nwaogu; C. Blawert; N. Scharnagl; W. Dietzel; K. U. Kainer

doi:10.1016/j.corsci.2010.03.002

Effects of organic acid pickling on the corrosion resistance of magnesium alloy AZ31 sheet

Ugochukwu Chibuzoh Nwaogu, C. Blawert, N. Scharnagl, W. Dietzel, K. U. Kainer

Helmholtz-Zentrum Hereon

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Organic acids were used to clean AZ31 magnesium alloy sheet and the effect of the cleaning processes on the surface condition and corrosion performance of the alloy was investigated. Organic acid cleanings reduced the surface impurities and enhanced the corrosion resistance. Removal of at least 4 mu m of the contaminated surface was required to reach corrosion rates less than 1 mm/year in salt spray condition. Among the three organic acids examined, acetic acid is the best choice. Oxalic acid can be an alternative while citric acid is not suitable for cleaning AZ31 sheet, because of insufficient removal of iron impurities.

Original language	English
Journal	Corrosion Science
Volume	52
Issue number	6
Pages (from-to)	2143-2154
ISSN	0010-938X
DOIs	https://doi.org/10.1016/j.corsci.2010.03.002
Publication status	Published - 2010

Keywords

EIS
IR spectroscopy
Weight loss
Acid solutions
Magnesium
Pitting corrosion

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title = "Effects of organic acid pickling on the corrosion resistance of magnesium alloy AZ31 sheet",

abstract = "Organic acids were used to clean AZ31 magnesium alloy sheet and the effect of the cleaning processes on the surface condition and corrosion performance of the alloy was investigated. Organic acid cleanings reduced the surface impurities and enhanced the corrosion resistance. Removal of at least 4 mu m of the contaminated surface was required to reach corrosion rates less than 1 mm/year in salt spray condition. Among the three organic acids examined, acetic acid is the best choice. Oxalic acid can be an alternative while citric acid is not suitable for cleaning AZ31 sheet, because of insufficient removal of iron impurities.",

keywords = "EIS, IR spectroscopy, Weight loss, Acid solutions, Magnesium, Pitting corrosion",

author = "Nwaogu, {Ugochukwu Chibuzoh} and C. Blawert and N. Scharnagl and W. Dietzel and Kainer, {K. U.}",

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doi = "10.1016/j.corsci.2010.03.002",

language = "English",

volume = "52",

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journal = "Corrosion Science",

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TY - JOUR

T1 - Effects of organic acid pickling on the corrosion resistance of magnesium alloy AZ31 sheet

AU - Nwaogu, Ugochukwu Chibuzoh

AU - Blawert, C.

AU - Scharnagl, N.

AU - Dietzel, W.

AU - Kainer, K. U.

PY - 2010

Y1 - 2010

N2 - Organic acids were used to clean AZ31 magnesium alloy sheet and the effect of the cleaning processes on the surface condition and corrosion performance of the alloy was investigated. Organic acid cleanings reduced the surface impurities and enhanced the corrosion resistance. Removal of at least 4 mu m of the contaminated surface was required to reach corrosion rates less than 1 mm/year in salt spray condition. Among the three organic acids examined, acetic acid is the best choice. Oxalic acid can be an alternative while citric acid is not suitable for cleaning AZ31 sheet, because of insufficient removal of iron impurities.

AB - Organic acids were used to clean AZ31 magnesium alloy sheet and the effect of the cleaning processes on the surface condition and corrosion performance of the alloy was investigated. Organic acid cleanings reduced the surface impurities and enhanced the corrosion resistance. Removal of at least 4 mu m of the contaminated surface was required to reach corrosion rates less than 1 mm/year in salt spray condition. Among the three organic acids examined, acetic acid is the best choice. Oxalic acid can be an alternative while citric acid is not suitable for cleaning AZ31 sheet, because of insufficient removal of iron impurities.

KW - EIS

KW - IR spectroscopy

KW - Weight loss

KW - Acid solutions

KW - Magnesium

KW - Pitting corrosion

U2 - 10.1016/j.corsci.2010.03.002

DO - 10.1016/j.corsci.2010.03.002

M3 - Journal article

VL - 52

SP - 2143

EP - 2154

JO - Corrosion Science

JF - Corrosion Science

SN - 0010-938X

IS - 6

ER -

Effects of organic acid pickling on the corrosion resistance of magnesium alloy AZ31 sheet

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