It was also found that the protecting effect of erodents on the coating surface does exist. The protecting effect will be more evident if using erosion efficiency of unit mass erodent of sand in the slurry to describe the erosivity of erodent. Besides a model is proposed to explain the protection process. The wear mechanism of the coating is the co-operation of ploughing, cracking and ablation.

對涂層的SEM分析可知自拍偷拍小说区，除沖蝕粒子在涂層表面的犁溝作用爱情岛论坛首页无码免费，沖蝕磨損的結(jié)果造成涂層的表面生成了系列針孔，其中的一部分為溶劑揮發(fā)所至99热精品区，另外還存在由增強顆粒的剝落和裂紋的擴展造成的涂層剝落產(chǎn)生的孔洞8x成年视频在线观看免费，這將可能為水的吸收和擴散造成有利條件，使復(fù)合涂層亞表層產(chǎn)生內(nèi)應(yīng)力女人扒开腿让男人桶白浆动态视频。

Based on the principles of chemical corrosion, this article discussed how to use variant erodents of nitric acid in alcohol to reveal the metallographic structure of one phase alloy and multiphase alloy .

作者從化學(xué)腐蝕原理出發(fā)精品丝袜国产在线精品不卡，對不同濃度的硝酸酒精侵蝕劑顯示單相合金與多相合金的金相顯微組織進行了研究和探討。