Nitrohydrofluoric development bath for titanium alloy components
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United States of America Patent
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Jul 13, 1993
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N/A
app pub date -
Jun 5, 1992
filing date -
Jun 12, 1991
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Abstract
A nitrohydrofluoric development bath for use in an electro-chemical etchingrocess, known as the 'blue etch process', for the non-destructive inspection of titanium or titanium alloy components such as turbo-machine blades and discs, the bath comprising, per liter, 320 g of nitric acid, from 13 to 22 g of hydrofluoric acid, from 4 to 7 g of dissolved titanium, and water as the balance.
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