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首页> 外文会议>Corrosion conference and expo 2011 >Corrosion Behavior of Air Plasma Sprayed Alloy 625 on Nickel Foam Substrate
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Corrosion Behavior of Air Plasma Sprayed Alloy 625 on Nickel Foam Substrate

机译：空气泡沫喷涂合金625在镍泡沫基底上的腐蚀行为

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摘要

Alloy 625 possesses excellent corrosion properties, in room temperature and particularly in saline, sulfuric acid and high temperature environments. Alloy 625 coating can be deposited on the surface of materials using Air Plasma Spraying (APS) technique to provide surface protection against corrosion. It is assumed that the coating can attain the excellent corrosion resistance similar to wrought alloy 625. It is therefore important to understand the corrosion behavior of APS sprayed alloy 625 as free standing sample. The microstructure of the APS alloy 625 is different than the wrought alloy due to the layered type structure with the presence of porosity and additional oxides and unmelted particles. All of these parameters can alter the corrosion property of APS deposited alloy 625. This study compares corrosion behavior of APS deposited alloy 625 with wrought alloy 625. Both open circuit potential and polarization measurements were used to evaluate corrosion properties of both materials. The corrosion resistivity of the APS alloy 625 and wrought alloy 625 were compared to the ones obtained from cold rolled steel for the reason of comparison. While wrought alloy 625 exhibited better corrosion resistivity compared to APS sprayed one, coating has shown outstanding corrosion resistivity compared to steel.
机译：625合金在室温下，特别是在盐水，硫酸和高温环境下，具有出色的腐蚀性能。可以使用空气等离子喷涂（APS）技术将625合金涂层沉积在材料表面上，以提供防腐蚀的表面保护。假定该涂层可以获得与锻造合金625相似的优异的耐腐蚀性。因此，重要的是要了解作为独立试样的APS喷涂合金625的腐蚀行为。 APS合金625的微观结构与锻造合金不同，这是由于存在孔隙，附加氧化物和未熔化颗粒的分层型结构所致。所有这些参数都可以改变APS沉积合金625的腐蚀性能。本研究比较了APS沉积合金625和变形合金625的腐蚀行为。开路电势和极化测量均用于评估这两种材料的腐蚀性能。出于比较的原因，将APS合金625和锻造合金625的耐腐蚀性与从冷轧钢获得的耐腐蚀性进行了比较。尽管与APS喷涂合金相比，锻造合金625表现出更好的耐腐蚀性，但与钢相比，涂层表现出出色的耐腐蚀性。

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