Acid etching bath for titanium alloy of components
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United States of America Patent
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May 11, 1993
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N/A
app pub date -
Jun 5, 1992
filing date -
Jun 12, 1991
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Abstract
An acid etching bath for activating titanium alloy components, especially turbo-machine blades and discs, before macrographic anodic oxidation in an electrochemical etching process, known as the 'blue-etch' process, for the non-destructive checking of the components, comprises 75.+-.5 ml/1 of sulphuric acid, from 11 to 15 g/1 of sodium fluoride, and water as the balance.
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