Zinciferous surfaces, particularly those of galvanized steel, may be effectively coated with an adherent corrosion resistant black layer of fine metal particles by contacting the surfaces with an aqueous solution.

• 镀锌表面； 特别是那些镀锌钢； 通过表面与溶液接触反应； 干净的钢表面有效的覆盖一层黑色抗腐蚀的微小颗粒层.