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Abstract Three solid solution Mg-xSn (x = 1, 5, 10 wt%) alloys are evaluated as candidates for the sacrificial cathodic protection of AZ31B-H24. The performance of each alloy was studied in situ with… Click to show full abstract
Abstract Three solid solution Mg-xSn (x = 1, 5, 10 wt%) alloys are evaluated as candidates for the sacrificial cathodic protection of AZ31B-H24. The performance of each alloy was studied in situ with global and local measurements of galvanic couples between Mg-Sn alloys and AZ31B-H24 when immersed in 0.6 M aqueous NaCl solution. Mg-1Sn was shown to galvanically protect AZ31B-H24 for 24 h with 95% efficiency. Polarity reversal was observed for Mg-5Sn during the initial 10 h, after which protection was offered; and Mg-10Sn provided no protection. Self-corrosion rates of 60% and 52% were observed for Mg-1Sn and Mg-5Sn alloys, respectively.
Journal Title: Corrosion Science
Year Published: 2019
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