Multilayered Coating for Downhole Tools with Enhanced Wear Resistance and Acidic Corrosion Resistance
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United States of America Patent
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May 14, 2015
app pub date -
Nov 12, 2014
filing date -
Nov 14, 2013
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Abstract
A coating for protecting a base material from wear and corrosion includes a first layer deposited directly onto an outer surface of the base material. In addition, the coating includes a second layer deposited directly onto the first layer. The first layer is positioned between the base material and the second layer. The first layer includes chromium having a first micro-crack density and the second layer comprises chromium having a second micro-crack density that is less than the first micro-crack density.
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