(a) Al provides an enhanced passivation capability over SAC105 solder alloy. (b) Corrosion products on the surface consist of Al 2 CuO 4 , Al 2 O 3 , SnO and SnO 2 . (c) Al-added SAC105 is less susceptible to corrosion.
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Nordin et al. (2015) studied this question.
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