测量了X70管线钢在NS4溶液中的极化曲线,研究了高密度脉冲电流处理对其腐蚀性能的影响.结果表明,高密度脉冲电流处理导致X70管线钢的晶粒细化,使其内部活性区减少,提高了管线钢的耐局部腐蚀能力.X70管线钢的耐局部腐蚀能力随着脉冲电流密度的提高而增强,腐蚀产物的分布也更加均匀细密.
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