AN IMPROVED PROCESS OF GALVANIZING HIGH STRENGTH STEEL SUBSTRATE IN WHICH A NICKEL OR NICKEL- PHOSPHORUS ALLOY COATINGS IS FIRST FORMED THROUGH ELECTRO OR ELECTROLESS PLATING TO ENHANCE ZINC COATABILITY AND ZINC ADHESION

摘要

An improved process of galvanizing high strength steel substrate to enhance zinccoatability and zinc adhesion, comprising the step of: depositing an intermediatemetallic layer by one of an electro plating and an electroless plating technique,wherein one of a solution containing nickel ions and a solution containing nickel-phosphorus alloys including a reducing agent, a complexing agent, and PH-adjusting alkali compound is supplied from one of an external power source andthe reducing agent; and hot-dip galvanizing of the substrate having saidintermediate metallic layer in a galvanizing bath.{FIGURE 1}