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An approach on error factors in thickness monitoring of self-fusing alloy coating by thermal spray

机译：热喷涂自熔合金涂层厚度监测中误差因素的探讨

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Electromagnetic method is often used in order tomonitor the thickness of thermal spray coating which is covered onthe materials such as boiler tube for prevention ofcorrosion/erosion wear. Ni-Cr based self-fusing alloy apraycoating can be measured by this method due to little ferrouscharacteristic. But it was found that this magnetic property waseasily changed under high temperature environment, and increasingmagnetic property resulted much underestimating of coatingthickness. It was evident that this increase of magneticcharacteristic was caused by increase of high Ni concentrationparts during high temperature aging. This trend depended on thekind of spray powder, and the spray layer which had highermagnetic property at the beginnig showed that the high tempertureaging led more increasing of magnetic property.It was concluded that the selection of spray powder was muchimportant for quality control of Ni-Cr based self-fusing alloy spraycoating using electromagetic thikcness tester.
机译：为了监视热喷涂层的厚度，通常使用电磁方法，该热喷涂层覆盖在诸如锅炉管的材料上，以防止腐蚀/腐蚀磨损。由于几乎没有铁特性，可以通过这种方法测量Ni-Cr基自熔合金喷涂层。但是发现在高温环境下这种磁性很容易改变，并且磁性的增加导致涂层厚度的低估。显然，这种磁特性的增加是由于高温时效过程中高Ni含量的增加所致。这种趋势取决于喷粉的种类，开始时具有较高磁性能的喷镀层表明，高温使磁性能增加更多。结论是，选择喷粉对于镍铬合金的质量控制非常重要。电磁测厚仪对基的自熔合金喷涂层进行喷涂。

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