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首页> 外文期刊>Surface Engineering >Erosion-corrosion behaviour of Ni-20Cr plasma coating in actual boiler environment
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Erosion-corrosion behaviour of Ni-20Cr plasma coating in actual boiler environment

机译：Ni-20Cr等离子涂层在实际锅炉环境中的冲蚀腐蚀行为

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Erosion-corrosion is encountered in a large variety of engineering industries. In such environments, protective coatings are used. In this investigation, erosion-corrosion of the Ni-20Cr coating on nickel and iron based superalloys has been investigated by subjecting them to the boiler of coal fired thermal power plant at the temperature zone of 540 degrees C for 1000 h duration. The erosion-corrosion kinetics of the plasma sprayed Ni-20Cr coating on different superalloys has been investigated. XRD, SEM with EDS and EPMA have been used to analyse the eroded-corroded products along the surface and cross-section. Main phases identified in all the Ni-20Cr coated superalloys after exposure are NiO, Cr2O3, Al2O3 and SiO2. Aluminium has penetrated from the bond coat to the top coat along the splat boundaries. Oxides of chromium, nickel and aluminium are recognized as protective oxides for boiler environment. The probable mechanism of attack for Ni-20Cr coating in the given boiler environment is discussed.
机译：在各种工程行业中都遇到侵蚀腐蚀。在这样的环境中，使用保护涂层。在这项研究中，研究了镍和铁基高温合金上的Ni-20Cr涂层的腐蚀腐蚀，方法是将它们置于温度为540℃的燃煤热电厂的锅炉中放置1000小时。研究了等离子喷涂Ni-20Cr涂层在不同高温合金上的腐蚀-腐蚀动力学。 XRD，具有EDS的SEM和EPMA已用于分析沿表面和横截面腐蚀的产品。暴露后在所有Ni-20Cr涂层高温合金中确定的主要相为NiO，Cr2O3，Al2O3和SiO2。铝已沿着粘结边界从粘结层渗透到面漆中。铬，镍和铝的氧化物被认为是锅炉环境的保护性氧化物。讨论了在给定的锅炉环境中Ni-20Cr涂层可能的腐蚀机理。

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