PASTE FOR HIGHLY ANTICORROSIVE RUST-PREVENTIVE COATING EXHIBITING EXCELLENT PROCESSABILITY IN SERVICE, HIGHLY ANTICORROSIVE RUST-PREVENTIVE COATING, HIGHLY ANTICORROSIVE STEEL COATED WITH THE COATING, AND STEEL STRUCTURE

PROBLEM TO BE SOLVED: To provide a paste for a highly anticorrosive rust-preventive coating that is excellent in anticorrosive properties and rust-preventive properties as well as excellent in processability in service such as weldability, fusibility and the like, and also to provide a highly anticorrosive rust-preventive coating, a highly anticorrosive steel material coated with the coating, and a steel structure. SOLUTION: The paste for the highly anticorrosive rust-preventive coating exhibiting excellent processability in service comprises an organic solvent containing a dispersant and, dispersed as a pigment therein, a Zn alloy particle having an average particle size of 0.05-200 μm, where the Zn alloy particle contains 0.01-30 mass% of Mg and has a physically fractured face and/or a crack having a length of at least 0.01 μm or a crack having a depth of at least 0.01 μm on the surface thereof. The coating obtained by using the coating comprises the dispersant containing a saturated fatty acid amide and/or an unsaturated fatty acid amide in an amount of 0.01-10 mass% based on the organic solvent. The steel material coated with the coating and the steel structure are also provided. COPYRIGHT: (C)2009,JPO&INPIT