What Is the Reason Behind the Need for Surface Treatment of Metals?
Knowledge

What Is the Reason Behind the Need for Surface Treatment of Metals?

It is inevitable that there will be some defects in the reprocessing process of metal-related mechanical equipment or parts. Therefore, the surface processing procedure of the last item is very important, and the function of surface beautification and protection is carried out, thereby improving the performance of metal parts and avoiding rust.
Published: May 10, 2023
What Is the Reason Behind the Need for Surface Treatment of Metals?

Why Need Surface Treatments?

In life, precision parts are often processed around us, and its existence brings great convenience to our lives and work. Sometimes, we will find that the precision parts are black after processing copper materials. What is the situation? How should we solve it? Because copper is an active metal atom, chemical reactions easily occur in the presence of oxygen in the air. Most of the metals will turn black after oxidation, producing copper oxide. The chemical reaction formula is: 2cu + o2 = 2cuo. In many cases, the brass parts that are processed by precision parts have been oxidized and blackened before being sent to the customer, the quality is reduced, the appearance is affected, and even the rework is performed, which increases the cost.

Therefore, when manufacturing precision parts, the passivization process of surface processing should be considered. The principle is to attach a layer of chemical conversion film. Because it is a chemical conversion film, it cannot be touched by hand. It does not affect conductivity, weld-ability, and work piece size. The hardness will not change.

Surface Treatment Process

The processing process is as follows: use a stainless steel container to fill the passivization solution, put the work piece to be processed and soak it for about 5 minutes, take out the work piece and rinse it with water to dry it; note that before doing passivization, the work piece must be pre-treated for the purpose To prevent oil stains or oxides on the surface of the work piece, it is necessary to remove the oil or clean the oxidation first. The stain can be removed with a cleaning agent or a decreasing agent, and then the surface is cleaned to passivization protection. To increase the brightness of the parts, the surface can also be polished with a polishing agent and then processed. The polishing process does not require any equipment throughout the process, and can be directly immersed.

Surface treatment is a process of artificially forming a surface layer on the surface of the base material that is different from the base in mechanical, physical and chemical properties. The purpose of surface treatment is to meet the corrosion resistance, abrasion resistance, decoration or other special functional requirements of the product. For metal castings, our more commonly used surface treatment methods are mechanical polishing, chemical treatment, surface heat treatment, and spraying the surface. Surface treatment is to clean, clean, deburr, degrease, and descale the surface of the work piece.

Published by May 10, 2023 Source :kknews

Further reading

You might also be interested in ...

Headline
Knowledge
The Smart Approach to CNC Technology
NC is the most important revolution since the first industrial revolution in the manufacturing industry. Since its successful development in 1950, NC technology has been undergoing important developments in hardware and software.
Headline
Knowledge
Six Essential Steps to Follow Before Creating A CNC Program
When the program enters the machine, any time saved by skipping the programming preparation is easily lost. Taking the time to prepare properly will help ensure the accuracy of the CNC program and improve efficiency.
Headline
Knowledge
Introduce Five Types of Stamping Processes: Milling, Machining, Die-Casting, Investment Casting, and Forging
Stamping is a manufacturing process that involves shaping thin-walled metal parts using punches and dies.
Headline
Knowledge
Explore the Functions of Stamping Presses and Their Machining Capabilities
Generally used for cold processing and a part of the machine used for hot processing can be called press.
Headline
Knowledge
What Is A Sawing Tool and Its Uses?
A saw tool is a common hand tool, divided into hand saws and electric power saws, which facilitates our simple sawing needs. Among them, hand saws are divided into many different types, and suitable hand saw tools can be selected according to different needs.
Headline
Knowledge
Introducing the Submerged Arc Welding Process
The main advantages of the SAW process are high quality and high productivity. The process can be implemented in three different operating modes-semi-automated, mechanized and automated.
Headline
Knowledge
How Is A Slotting Machine Structured and Operated?
Slotting machines are reciprocating machines that are mainly used to manufacturing horizontal, vertical or flat surfaces.
Headline
Knowledge
What Is A Boring Machine, and What Are Its Different Types?
Boring Machine is different from other machine tools and mainly suitable for boring machine processing.
Headline
Knowledge
What Types of Drilling Machines Exist and What Are Their Applications?
A drilling machine is a machine tool primarily used for making a round hole or driving fasteners. A drilling machine is used for the drilling process, and it is also the processing technology often required in manufacturing production.
Headline
Knowledge
Fundamental Welding Principles and Its Various Types
Welding is a process that uses "heat" and "electricity" to connect two pieces of metal, and the type of welding metal will also affect the welding results and technical requirements; like many professional skills, welding technology also has different levels of difficulty. First understand the most common types of welding introduction, principle teaching, and skill analysis.
Headline
Knowledge
What Are the Different Types of Chips in Milling Machines?
The milling machine is a very diverse processing machine, evolved from a lathe. A lathe is a machine commonly used to produce cylindrical or rotating parts, and the milling machine is commonly used to produce rhomboid or non-rotating parts.
Headline
Knowledge
Comprehending the CNC Motion Controls and Its Three Common Types
The first benefit offered by all forms of CNC machine tools is improved automation Because of the operator intervention related to producing workpieces can be reduced or eliminated.
Agree