Titanium etchants

The CEER process has also been used for ammoniacal etchants (Fig. 9.12(b)] when a sulphuric acid anolyte is preferred together with platinized titanium anodes graphite cathodes are retained. In this case the anode reaction is oxygen evolution etchant oxidation readily takes place chemically via dissolved oxygen in the etching machine ... 

The engine platforms are constructed from titanium pillars and titanium sheeting. The metal is prelreated with an etchant acid mixture and then bonded at 175°C with Redux 319, to obtain the required higher service temperature. 

Most materials can be chemically machined with the correct chemical etchant selection, commonly ferrous, nickel, titanium, magnesium and copper alloys, and silicon. 

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