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The effect of sulphate, phosphate, nitrate and acetate on the corrosion behaviour of ZnAl–Mg hot‐dip galvanised steel
Author(s) -
Keppert T. A.,
Luckeneder G.,
Stellnberger K.H.,
Mori G.,
Antrekowitsch H.
Publication year - 2014
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201307100
Subject(s) - galvanization , corrosion , chloride , phosphate , metallurgy , nitrate , sodium , chemistry , salt spray test , salt (chemistry) , materials science , sodium nitrate , nuclear chemistry , inorganic chemistry , composite material , layer (electronics) , organic chemistry
In this work the hot‐dip galvanising coating ZnAl2Mg2 was tested against the reference material ZnAl0.2 in nonstandardised salt spray test. In those tests the samples were exposed to the sodium salts of sulphate, nitrate, phosphate and acetate. The corrosion products formed on the alloys were analysed with XRD. Additionally the corrosion behaviour of the samples was investigated by studying cross‐section cuts with SEM. With this information the corrosivity of the different anions in relation to chloride ions and their corrosion behaviour could be determined.