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首页> 外文期刊>Surface & Coatings Technology >Corrosion behaviours two nickel-based coatings in H2S-containing environments
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Corrosion behaviours two nickel-based coatings in H2S-containing environments

机译：在含H2S的环境中两种镍基涂层的腐蚀行为

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摘要

In view of the severe sulfidation of boiler tubes used in coal-burning power plants, exposures to mixed gas environments containing 10% H2S at 400, 500 and 600 degreesC were carried out to study the corrosion behaviour of two coatings arc sprayed on a mild steel substrate. One of the coatings is made from commercially available Ni70Cr30 alloy, and the other a high chromium (>40 wt.%) nickel-based alloy newly developed by the authors. The curves of corrosion kinetics were plotted according to thermogravimetric data of the coatings. Metallurgical microscopy was used to observe the morphologies of the corrosion products and SEM was used for elemental mapping. The results obtained indicate that the coating made from the high chromium alloy shows excellent resistance to sulfidation and is suitable for use as protective layers of boiler tubes. (C) 2003 Elsevier B.V. All rights reserved.
机译：鉴于燃煤电厂锅炉管的严重硫化，我们在400、500和600℃下暴露于含10％H2S的混合气体环境中，以研究两种电弧喷涂在低碳钢上的涂层的腐蚀行为基质。作者中新开发的一种涂层是由可商购的Ni70Cr30合金制成，另一种是作者新开发的高铬（> 40 wt。％）镍基合金。根据涂层的热重数据绘制腐蚀动力学曲线。用金相显微镜观察腐蚀产物的形貌，用SEM进行元素标测。所得结果表明，由高铬合金制成的涂层显示出优异的抗硫化性，并且适合用作锅炉管的保护层。 （C）2003 Elsevier B.V.保留所有权利。

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