对4种不同级别的钢在600℃～800℃氧化和海水淬冷 交替作用下的循环腐蚀行为进行了研究.在实验条件下，绝大多数材料均发生了严重的氧化 .特别在800℃下，所有材料氧化失重明显.材料施加渗Al涂层后，极大地改善了它们的抗 氧化性能，且材料级别越低，改善作用越明显.海水中的NaCl对材料的高温腐蚀有显著的加 速作用，造成渗Al涂层快速退化.循环淬冷造成渗Al涂层外层发生开裂，且在蒸馏水中比在 海水中淬冷时形成的裂纹数量多且宽度大.
The cyclic oxidation of four different steels withou t and with aluminide coatings under the condition of quenching in sea water has been studied. During the test at 600℃ and 800℃,16Mn,1Cr12Mo and 1Cr18Ni9Ti suf fered from big mass lost. Only GH140 has good oxidation resistance at 600℃. The aluminide coatings can improve the oxidation resistance of four steels. The low er the heat resistant grade of the steel,the higher the improvement effect of th e coating.NaCl in the sea water causes more severe corrosion, increases in degra dation of the coatings.The cyclic test with quenching in distilled water, induced more severe cracks on the surface layer of the aluminide coatings in com parision with sea water quenching.
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