Adhesion strength of oxide layer formed on carbon steel in air at elevated temperature was evaluated using a laser shock method to reveal the influence of the oxide layer on the wall-thinning behavior caused by liquid droplet impingement. The strength of the interface between magnetite and the carbon steel was comparative to the yield stress of the steel or less. It was suggested that formation of the oxide layer reduce the critical velocity, which might result in exfoliation and wall-thinning, compared to without oxide layer.

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