一种高强度耐腐蚀铝型材加工工艺
本发明公开一种高强度耐腐蚀铝型材加工工艺,属于金属材料表面处理技术领域。本发明铝型材加工工艺采用阶梯电流起弧氧化和双重封孔处理,两个创新点工艺步骤相互衔接、协同增效。阶梯电流的复合阳极氧化为双重封孔提供了一个结构优化、活性点丰富的基底,而双重封孔则最大限度地巩固和发挥了复合氧化膜的耐腐蚀性能。本发明工艺条件温和,所使用的化学品均为环境友好型,稀土元素的添加量少但效果显著,特别适用于对强度和耐腐蚀性有苛刻要求的6系铝合金型材。
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