PROCEDIMIENTO DE PASIVACION SIN CROMO PARA CINC Y ALEACIONES DE CINC.

摘要

A non-chrome containing composition and process are disclosed for enhancing the corrosion resistance of zinc or zinc alloy surfaces. The composition comprises a source of titanium ions or titanates, an oxidant and fluorides or complex fluorides. The composition also preferably comprises an organic acid and/or a Group II metal compound, preferably a Group II metal chloride.