タービン部品の酸洗処理
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概要
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The author investigated effects of 5% and 10% hydrochloric acid and sulphuric acid solutions, in which 0.1% and 0.2% Urotropin was contained, on the removal of oxide films from cast iron, and illustrated that 10% hydrochloric acid solution conthining 0.2% Urotropin was the most effective. When employing this solution, oxide films were removed perfectly in relatively short time and the metal surface left behind was very smooth.<BR>Then, acid cleaning of turbine parts was performed using the same solution. It was concluded that acid cleaning was more effective than mechanical cleaning.
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