Thermal sprayed aluminum coatings can provide excellent corrosion protection for steels. However, the coatings can't be applied directly due to its high porosity unless specific surface properties required such as roughness, electric conduction or heat conduction. In this study, we focused on the effects of post treatment on the corrosion resistance of thermal sprayed aluminum coatings. The specimens were treated with chromating, steam treatment, heat treatment and resin dipping after thermal spraying. The post-treated specimens were subsequently assessed by salt-spray test and electrochemical test to estimate the influence of post treatment on the corrosion resistance of thermal sprayed aluminum coating. The experimental results showed that the chromating and steam treatment were helpful to seal the pores and to promote anti-corrosion performances of thermal spraying layers.
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