Ｎｉ－Ｃｒ－Ｃｅ合金经７００℃空气预氧化后在高温氯气中的腐蚀行为涂江平，毛志远，李志章（浙江大学杭州３１００２７）改善合金在高温含卤素气氛中的抗腐蚀性能，可以由形成和维持化学性质稳定、结合强度高和完整性好的表面膜来实现［１］．然而在较高氯分压的高温环境中Ｎｉ－Ｃｒ合金表面所形成的腐蚀膜难以具有保护作用，不能有效地阻碍Ｃ１２的继续侵蚀，因而使合金表现出很高的腐蚀速度．采用预氧化工艺使合金表面形?...
The chlorination behavior of preoxidized Ni-13.2Cr-0.47Ce alloy was investigated thermogravimetrically between 400℃ and 700℃ In Cl2 the formation of volatile chlorides occurred. Preoxidized samples of the Ni-Cr-Ce alloy showed better resistance against chlorination than as received samples because of the formation of protective chide scale.During chlorination at lower temperature,weight change of the alloy versus time followed parabolic rate low.Oxide scale exhibited only slight damage after long-time come sion.At medium temperatures,the chide scale aller long-time exposure,showed up a severely blistered morphology.At higher temperatures,oxide scale was destroyed even in a short time.The rate of corrosion increased rapidly and there was a linear decrease in weight with time.
参考文献
| [1] | |
| [2] | |
| [3] | HancockPSymposiumonhalidechemistry,electrochem,soc,1978,1:6452MoonDP．Oxid．Metal,1989,32:473KubaschewskiO,AlcockCBMetall．Thermochem |
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