Non-phosphorus electrolytic polishing liquid and technology for polishing workpiece surfaces with same

Abstract

The invention discloses non-phosphorus electrolytic polishing liquid and a technology for polishing workpiece surfaces with the same. The non-phosphorus electrolytic polishing liquid comprises 30%-60% of sulfuric acid, 15%-35% of organic acid, 1%-5% of brightener, 2%-10% of viscosity modifier, 1%-5% of corrosion inhibitor and 20%-30% of water. The non-phosphorus electrolytic polishing liquid does not contain components not allowed by environmental standards, waste water is convenient to process in the cleaning process, and toxic effects on human body and livestock are avoided. The invention further provides the best polishing process condition for polishing stainless steel workpieces with the non-phosphorus electrolytic polishing liquid. The electrolytic polishing effect is completely identical with the polishing effect of original phosphoric acid electrolytic polishing liquid. The polishing time is short, and machining cost is low.

Description

technical field [0001] The invention relates to the technical field of electrochemical polishing, in particular to a phosphorus-free electrolytic polishing liquid and its preparation method and application. Background technique [0002] Electrolytic polishing is to use the workpiece to be polished as the anode and the insoluble metal as the cathode. The two poles are immersed in the electrolytic cell at the same time, and a direct current electrochemical reaction is used to produce selective anode dissolution, so as to achieve the removal of fine burrs on the surface of the workpiece and increase the brightness. Effect. [0003] Most of the existing stainless steel electrolytic polishing solutions use phosphoric acid and sulfuric acid as the main components, and then add corresponding additives, and some formulations even add chromic anhydride to improve the effect of electrolytic polishing. For example, the patent application number 200510109406 "Electrolytic Polishing Liq...

AI Technical Summary

Problems solved by technology

[0004] In the existing polishing liquid formula, chromic acid is highly toxic and corrosive; phosphoric acid is expensive, and when the phosphorus content in the water body exceeds 20mg / L, it will lead to eutrophication of the water body, causing a large number of algae to multiply, and after the death of the algae Decomposition will produce musty and foul smell in the water body, affecting the survival of aquatic organisms such as fish

[0005] The patent application No. 201110151813.7 discloses "a stainless steel chrome-free electrolytic polishing solution and its surface polishing process". Although the use of phosphorus-free and chromic acid is avoided, the main component methanol or ethanol used in it will cause harm to the human body. Toxic effect