Pre-oxidization thermal coloring method for verdigris

Abstract

The invention provides a pre-oxidization thermal coloring method for verdigris. The pre-oxidization thermal coloring method comprises the following steps of (1) polishing the surface of a copper plate; (2) cleaning the copper plate by using deoiling water, wherein the deoiling water is prepared from the following raw materials in parts by weight: 9-11 parts of deoiling powder and 660-720 parts ofwater; (3) cleaning the copper plate by using water with activated carbon; (4) heating the copper plate to 160-260 DEG C, spraying an oxidizing medicinal liquid to the surface of the copper plate uniformly and heating the copper plate continuously for 1-2 hours by using a flame gun to color verdigris of the copper plate; and (5) after cooling the copper plate, spraying 20-25 [mu] transparent fluorocarbon protecting paint o the surface of the copper plate. The pre-oxidization thermal coloring method shortens the verdigris coloring time greatly, so that the production efficiency is improved. Meanwhile, the oxidization degree of the copper plate can be further adjusted precisely, and the copper plate is more flexible in color and is closer to a natural oxidization effect.

Description

【Technical field】 [0001] The invention relates to a metal surface treatment method, in particular to a verdigris pre-oxidation thermal coloring method. 【Background technique】 [0002] The patina is a unique color exhibited by the copper plate during the oxidation process. With the increase of time and the degree of oxidative corrosion, it gradually changes from the initial red to brown, and finally forms a high-grade and elegant patina. Most of the traditional patina coloring methods are cold coloring or natural coloring. The method is to put the copper parts outdoors or bury them in the soil, and add some oxidizing potion formulas to slowly change the color on the surface. In the natural state, it takes more than 10-20 years for the copper plate to form an elegant and uniform patina, and now the more common patina coloring method is chemical oxidation, but the patina color achieved by the existing chemical oxidation treatment method is not natural enough, and the color comp...

AI Technical Summary

Problems solved by technology

In the natural state, it takes more than 10-20 years for the copper plate to form an elegant and uniform patina. Nowadays, the more common patina coloring method is chemical oxidation, but the patina color achieved by the existing chemical oxidation treatment method is not natural enough. Hard, less effective, and takes a few days for coloring to complete