| 摘要 |
A method of removing a virgin metal oxide coating from the surface of a superalloy gas turbine engine component. The component bearing the applied metal oxide coating is contacted with an aqueous coating-removal solution, typically containing by weight about 10 - 25 % alkali hydroxide, about 1 - 8 % alkanolamine, and about 0.5 - 5 % gluconate salt at a temperature of from about 170 DEG F (67 DEG C) to about 210 DEG F (99 DEG C), for a time sufficient to remove the metal oxide coating from the superalloy blade by gentle mechanical means. The metal oxide coating can comprise one or more metal oxide layers, such as a chromium oxide layer and an aluminum oxide layer.
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