铝合金高效节能微弧氧化的研究进展

摘要

为增强合金的摩擦腐蚀性能,减小微弧氧化能量损耗,研究了电压控制模式下各种工业用变形、重力铸造和流变铸造铝合金微弧氧化涂层.结果表明:采用传统多孔阳极膜前驱体,减小了微弧氧化能量损耗至50％;添加α-Al2O3粒子的微弧氧化涂层后,6082合金的磨损比电解硬铬的低2倍.通过使用前驱体和疏水后处理,提高了包覆微弧氧化涂层A356合金的长期耐蚀性.%Plasma electrolytic oxidation (PEO) coatings developed under voltage-controlled mode on various commercial wrought,gravity cast and rheocast aluminium alloys were discussed with respect to enhancement of their tribological and corrosion performance and minimization of the PEO energy consumption.It is demonstrated that use of conventional porous anodic film precursors reduces the PEO energy consumption by up to 50％.The wear of 6082 alloy with PEO coatings with added α-Al2O3 particles is two times lower compared with electrolytic hard chrome.The long-term corrosion resistance of the PEO-coated A356 rheocast alloy is enhanced via use of a precursor and hydrophobic post-treatment.