Process for removing aluminum-silicon coatings from metallic structures, and related processes for preparing magnetic components
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United States of America Patent
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Oct 31, 2017
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app pub date -
Jun 24, 2016
filing date -
Jun 24, 2016
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Abstract
A method for selectively removing an aluminum-silicon coating fired on a surface of a metallic structure is described. The method includes the step of contacting the coating with molten potassium hydroxide (KOH), under conditions sufficient to remove the coating without substantially affecting the metallic surface. Methods for preparing a magnetic component are also described. They involve masking pre-selected regions of the surface of the component, using an aluminum-silicon coating that is fired onto the surface, prior to a nitriding step. The coating is then removed according to the procedure outlined herein.
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