CAJ | 학술논문

为提高镁合金的耐蚀性能，采用超音速微粒沉积技术在ZM5基体上制备Al-Si防护涂层。采用环氧面漆对涂层进行封孔处理，采用电化学方法和中性盐雾实验对镁合金基体、涂层及涂层封孔后的抗腐蚀性能进行测试。结果表明：防护涂层致密，缺陷少，可显著提高ZM5镁合金的耐蚀性能；腐蚀电流密度比基体降低2~3个数量级，阻抗模值提高2个数量级，而涂层封孔后耐蚀性能进一步提高。相比镁合金24 h严重腐蚀，涂层中性盐雾实验1000 h仅轻微腐蚀，腐蚀造成的质量损耗较小，封孔后涂层未见明显腐蚀，可为镁合金提供长效防护。
위제고미합금적내식성능，채용초음속미립침적기술재ZM5기체상제비Al-Si방호도층。채용배양면칠대도층진행봉공처리，채용전화학방법화중성염무실험대미합금기체、도층급도층봉공후적항부식성능진행측시。결과표명：방호도층치밀，결함소，가현저제고ZM5미합금적내식성능；부식전류밀도비기체강저2~3개수량급，조항모치제고2개수량급，이도층봉공후내식성능진일보제고。상비미합금24 h엄중부식，도층중성염무실험1000 h부경미부식，부식조성적질량손모교소，봉공후도층미견명현부식，가위미합금제공장효방호。
In order to improve anti-corrosion properties of magnesium alloy, Al-Si coating on the ZM5 magnesium alloy was prepared by micro-supersonic particles deposition. The electrochemical method and the neural salt-spray test were used to evaluate the corrosion resistance of the magnesium substrate, Al-Si coating and the coating with sealing specimens. The results indicate that the Al-Si coating is dense and less of defects, and it can improve the corrosion resistance of ZM5 substrate obviously. The corrosion current density decreases 2~3 orders of magnitude and the impedance modules increases 2 orders of magnitude in contrast to magnesium, and the coatings with sealing can improve corrosion resistance of substrate further. Compared with the severe corrosion of magnesium at the 24 h neural salt-spray test, the coating is just corroding slightly at 1 000 h and the mass loss of specimens is little, and the corrosion of coating with sealing is not observed obviously, so the coating and the sealing treatment can make a long-life protection for ZM5.