Abstract
The possibilities of application of thick (thickness 100 m) self-glued polyvinylchloride masks (SPM) as mask at electrochemical marking of parts from aluminum alloys (alloy D1 with Cu, Mn and Mg as alloying components) have been investigated. We demonstrate that at anode etching of alloy in chloride solu- tion there is black, well-adhesive film from oxides of alloying components on the surface. This film may serve as base for patterning at marking. Localization of marking at various kinds of electrochemical machin- ing (direct current, pulse unipolar current, anode-cathode machining at different ratio of charges in anode and cathode pulses Qa/Qc) has been investigated. We demonstrate that localization increases at increasing current density. Maximal localization was observed at anode-cathode machining. We determined optimal ratios Qa/Qc for applied average current densities, which provide maximal localization. We showed that suggested method of marking in combination with X-ray analysis of formed film may be used for protection of parts from given alloy at marking of they.