Zn-based composite-plated metallic material and plating method

摘要

A Zn-based composite plating is carried out simultaneously with deposition of Zn and of metallic compounds by a cathode precipitation reaction. This plating is advantageous over conventional Zn or Zn alloy plating having a disadvantage of low sacrificing anode protection at a high content of noble metal and over a conventional dispersion plating having a disadvantage of low co-depositiion degree. The inventive plating attains improved, corrosion-resistance, paintability, formability and adaptability to post-treating.