Electrochemical grind (polishing) method for stainless steel

Abstract

A process for electrochemically grinding (polishing) stainless steel material includes preparing electrochemical grinding liquid from phosphoric acid, sulfuric acid, brightening agent and water and immersing the stainless steel material in it at 15-75 deg.C for 1min-2 hrs while applying current by 10-25 A / sq.dm. Its advantages are high grinding effect up to 8K and no environmental pollution.

Description

1. Technical field [0001] The invention relates to a surface grinding and polishing method of a stainless steel material (workpiece), in particular to a stainless steel electrochemical grinding (polishing) method. 2. Background technology [0002] The commonly used electrochemical grinding solution is composed of phosphoric acid, sulfuric acid, gelatin (bone glue) and other components. The solution has a large viscosity coefficient, poor fluidity, contains a lot of phosphoric acid, and the content of chromic anhydride is more than 50 grams per liter. It pollutes the environment and is only suitable for use. It is used for fine grinding (polishing) of fine parts, but not suitable for large containers and large mechanical parts because of its high current density (up to 30-40A / dm 2 ), the viscosity is large, the workpiece is taken out of the bath more, the waste is large, the cleaning waste water cannot be recycled, and the production cost is high. Japanese Patent Application...