What is the Reason for Surface Treatment of Metals?
Knowledge

What is the Reason for Surface Treatment of Metals?

Defects are bound to occur during the reprocessing of mechanical equipment or metal parts. As a result, the final step of surface treatment holds significant importance. It serves the dual purpose of enhancing the aesthetics and protecting the surface, ultimately improving the performance of metal components and preventing rust.
Published: Nov 03, 2023
What is the Reason for Surface Treatment of Metals?

Why is Surface Treatment Necessary?

In our daily lives, precision parts play a crucial role, bringing convenience to both our personal and professional activities. Sometimes, when working with copper materials, we may notice that precision parts appear black after processing. What causes this, and how can it be addressed? Copper, being an active metal, readily undergoes chemical reactions in the presence of oxygen from the air. Most metals tend to turn black due to oxidation, resulting in the formation of copper oxide. The chemical reaction formula can be expressed as: 2Cu + O2 = 2CuO. In many instances, brass parts created as precision components have already oxidized and turned black before they reach the customer. This not only affects the quality and appearance but may also necessitate rework, thereby increasing costs.

Hence, when producing precision parts, it is imperative to consider the surface treatment passivation process. The underlying principle involves the application of a chemical conversion film to the surface. As it is a chemical conversion film, it remains unaffected by touch, preserving attributes like conductivity, weldability, and the workpiece's dimensions. Importantly, the hardness remains unaltered.

The Surface Treatment Process

The surface treatment procedure is as follows: Utilize a stainless steel container to contain the passivation solution, immerse the workpiece to be treated for approximately 5 minutes, remove the workpiece, rinse it with water, and allow it to dry. It's worth noting that prior to passivation, the workpiece must undergo pre-treatment to eliminate any surface oil stains or oxidation. Stains can be removed using a cleaning agent or a degreasing agent, followed by a thorough cleaning to prepare for passivation protection. If a higher level of brightness is desired for the parts, the surface can be polished using a polishing agent before proceeding. The polishing process requires no special equipment and can be performed directly by immersion.

Surface treatment is a deliberate process that imparts a surface layer onto the base material with mechanical, physical, and chemical properties distinct from the base. The primary objective of surface treatment is to fulfill specific product requirements, such as corrosion resistance, wear resistance, aesthetics, or other unique functional needs. For metal castings, common surface treatment methods include mechanical polishing, chemical treatments, surface heat treatments, and surface coatings. Surface treatment encompasses actions like cleaning, deburring, degreasing, and descaling the workpiece's surface.

Published by Nov 03, 2023 Source: kknews

Further reading

You might also be interested in ...

Headline
Knowledge
Precision in Rotation: Indexing Plates in Metal Machining
Rotary Indexing Plates are precision components of milling machines that facilitate the precise angular positioning of workpieces and cutting tools. They are used in both metal machining and woodworking, and while they share a fundamental purpose, there are notable differences in their design, capabilities, and applications due to the distinct characteristics of the materials and processes involved.
Headline
Knowledge
Sheet Metal Fabrication Machines: An Overview
Sheet metal machines are widely used in various manufacturing industries for shaping, cutting, and forming sheet metal into different components. Some of the industries that extensively utilize sheet metal machines include light industries such as electrical and medical equipment, all the way up to heavy industries such as automotive, rail, oil and gas, as well as wind power generation.
Headline
Knowledge
The Significance of Planing Machines in the Machining Tool Industry
Metal and wood planing machines are essential tools in the machining industry. Wood planers use a rotating cutterhead equipped with sharp blades to smooth and size workpieces, ensuring uniformity in woodworking projects. Metal planers use a cutting tool mounted on a reciprocating tool head to remove excess material from metal surfaces, achieving precise dimensions in components. Both types of planning machines enhance efficiency, precision, and the overall quality of finished products. Understanding the key features of the various types of planing machines will help you choose the right machine best suited for your machining needs.
Headline
Knowledge
Stamp Press Technology and Manufacturing in Taiwan
Nestled in the heart of East Asia, Taiwan has emerged as a powerhouse in the global stamp press industry, with a robust manufacturing ecosystem, and cutting-edge technology. With a rich manufacturing tradition and a focus on precision engineering, Taiwanese companies meet the demands of diverse sectors, ranging from electronics and automotive to medical devices and aerospace, supplying high-quality stamp press solutions to a diverse range of markets worldwide.
Headline
Knowledge
Introduction to Stamp Press Technology
Stamp press technology, also known as stamping or pressing, is a manufacturing process that utilizes a press to shape or cut materials into desired forms. This process involves the use of a die and a punch to form or cut the material, creating intricate shapes with high precision. Widely employed for mass production due to its speed, accuracy, and repeatability, this process is a crucial part of modern manufacturing.
Headline
Knowledge
Mechanical Reducers in Industrial Manufacturing
Speed reducers are powerful mechanical devices generally used in machining tools to multiply the force or torque generated by an input power source, thereby increasing the usable force, enhancing the performance and precision of the machining tool. They are also used in material handling systems such as conveyor belts and lifting mechanisms to control the speed of material transfer and manage heavy loads efficiently. By multiplying the available output force, they enable the use of a reduced input power source, resulting in cost savings for machine tool investments. When choosing the appropriate speed reducer, the torque, speed, and horsepower of the input, as well as the mounting configuration, efficiency, and required lifetime all need to be considered. The quality of the machine chosen will also be reflected in the amount of backlash, transmission error, torsional rigidity, and inertia experienced during machining.
Headline
Knowledge
Introduction to Stamp Press Technology
Stamp press technology, also known as stamping or pressing, is a manufacturing process that utilizes a press to shape or cut materials into desired forms. This process involves the use of a die and a punch to form or cut the material, creating intricate shapes with high precision. Widely employed for mass production due to its speed, accuracy, and repeatability, this process is a crucial part of modern manufacturing.
Headline
Knowledge
Innovations in Sawing Technology
The traditional image of saws as just cutting tools is being reshaped by cutting-edge advancements that integrate automation and robotics in sawing technologies, paving the way for greater precision and efficiency of sawing technology in manufacturing.
Headline
Knowledge
The Fundamentals of Drilling Machines
Drilling machines play a pivotal role in the manufacturing industry, using rotary motion to create precise holes in a variety of materials. Whether it's metal, wood, plastic, or composites, drilling machines are versatile and essential for producing components in countless applications.
Headline
Knowledge
Hybrid Milling in Manufacturing: Integrating Additive and Subtractive Processes
The integration of additive manufacturing (AM) and subtractive milling processes has emerged as a transformative manufacturing process known as hybrid milling. This technique combines the strengths of both 3D printing and traditional subtractive milling, opening up new possibilities and diverse applications for creating complex geometries with improved material efficiency.
Headline
Knowledge
Features and Mechanics of Industrial Saws
Industrial saws shape raw materials into precise components that form the backbone of countless products. Understanding the mechanics of sawing, examining the fundamental principles, cutting mechanisms, and essential aspects of safety and maintenance will ensure the most efficient and safe operation of industrial saws.
Headline
Knowledge
Understanding the Diversity of Industrial Saws
Industrial saws play a pivotal role in processing a wide range of materials with precision and efficiency. Taiwan is a major supplier of industrial saws to the automotive, aerospace, and construction, as well as the metal fabrication industries. This article aims to provide a comprehensive understanding of the diverse industry of industrial saws, exploring their types, structures, applications, and the crucial role they play in various industries.
Agree