Manufacture method of high-performance anticorrosion composite metal tube and novel color lean pipe

Abstract

The invention discloses a manufacture method of a high-performance anticorrosion composite metal tube, comprising the steps of: fabricating a metal substrate tube and preparing a soluble electrolyte containing activated aluminum elements, removing oil and rust from the outer surface of the tube, placing the tube into the soluble electrolyte for reaction to remove residual aluminum, and polishing the tube; placing the polished metal substrate tube into a solution containing hydrogen peroxide and potassium permanganate to generate an outer white bright layer composed of pure aluminum elements; and carrying out oxidation coloring treatment on the white bright layer by using a chemical solution, immersing the tube into an oxidation solution, and controlling the concentration and temperature of the solution to from a color oxidation film covering the upper surface of the white bright layer. The invention solves the technical problems that an anticorrosion nitriding workpiece has an incomplete anticorrosion nitriding layer and can not be packed closely, has the characteristics of complete nitriding layer, strong anticorrosion property, low cost, suitability to scale production and the like, greatly improves single furnace output and meets requirements of anticorrosion tests. The invention further provides a novel color lean pipe manufactured by adopting the method.

Description

technical field [0001] The invention relates to the technical field of metal pipe manufacture, in particular to a method for manufacturing a high-performance anti-corrosion composite metal pipe and a novel colored lean pipe structure manufactured by the method. Background technique [0002] Lean pipe, also known as wire rod, steel-plastic composite pipe or flexible pipe, is made of high-quality steel pipe after surface treatment, the outer surface is made of thermoplastic bonding special plastic layer, and the inner surface is covered with anti-corrosion layer. After the product is composed, it has the characteristics of beautiful appearance, wear resistance, bright color, anti-rust and no pollution. It is an ideal substitute for stainless steel products. Its appearance and color can make different effects according to different requirements. The traditional lean pipe is made of metal welded steel pipe with plastic resin coating, covered with plastic. Because the outer laye...

AI Technical Summary

Problems solved by technology

During work, rely on the stirring fan to homogenize the nitriding atmosphere in the equipment, hoping to evenly contact the surface of the workpiece with the ammonia gas newly flowing into the equipment, but the reality shows that the effect is limited

Images