Saures Ätzbad für Titanlegierungen vor anodischer makrographischer Oxidation

摘要

Bath for acidic etching of titanium alloys before macrographic anodic oxidation for an electrochemical etching process known under the name of "BLUE-ETCH". …In accordance with the invention this bath consists of: … …  - 75 +/- 5 ml/l of sulphuric acid …  - 11 to 15 g/l of sodium fluoride …  - water in sufficient quantity for one litre. … …This process is particularly suitable for the nondestructive control of turbine vanes and discs made of titanium or titanium alloy.