| 摘要 |
PROBLEM TO BE SOLVED: To make is possible to achieve sufficient electrolytic corrosion protection even during drying by forming a conductive coating which contains a specific amount of metal compound power with photoconductivity and a specific surface resistance value or a hydrophilic coating with a specific contact angle with water on the surface of a steel material and running anticorrosion current. SOLUTION: After routine pretreatment is applied to the surface of a steel material 1 according to necessity, an anticorrosive coating 2 is formed by applying a primer and an anticorrosive coating on the surface of a steel material 1, if necessary. Further, a conductive or a hydrophilic coat 3 is formed by applying a coating which forms the conductive coat or a coating which forms the hydrophilic coat to the surface of the coated or uncoated steel material 1. The coating which forms the conductive coat or the hydrophilic coat is blended with a metal compound power with photoconductive whose content is 5-80wt.% of the total coating solid content. In addition, the surface resistance value of the conductive coating is 10<7> Ω/cm<2> or less, and the contact angle of the hydrophilic coat with water is set at 70 deg. or less. Further, anticorrosion current is run between an anodic plate 4 and the steel material 1 by applying a direction current from a power supply. |
