Surface treatment - Zhejiang Ningbo Hexin focus on low pressure casting, gravity casting, die casting mold manufacturing, aluminum casting factory

The Complete Guide to Shot Peening Aluminum Products: Processes, Advantages and FAQs

2026-02-28

In the aluminum alloy die-casting industry, surface treatment is one of the key links to determine the final quality of the product. As an efficient and environmentally friendly surface treatment process, shot blasting is widely used in automotive parts, 3C electronic shells, hardware accessories and other fields. It not only removes the oxide skin and burrs on the surface of die castings, but also improves the metal organization and fatigue strength. This article will bring you a comprehensive understanding of the process principle, advantages, equipment selection and common problem solutions of aluminum alloy shot blasting, to help you make more professional decisions in production and procurement. Shot Peening Show 1. What is aluminum alloy shot peening? Analysis of the process principle Shot blasting is a physical surface treatment technology that uses high-speed movement of the projectile stream to impact the surface of the workpiece to achieve the purpose of cleaning, strengthening or decorating. 1.1 Working principle The core of shot blasting...

The Ultimate Guide to Aluminum Polishing: From Mechanical to Chemical Polishing for a Mirror Finish

2026-02-27

Want to make the surface of aluminum alloy as bright as mirror? This article provides an in-depth analysis of the mechanical polishing, chemical polishing and electrolytic polishing processes, and solutions to common defects (such as flow marks), to help you improve the texture of your products.

Comprehensive Analysis of Aluminum PVD Coating: The Ultimate Surface Treatment Technology to Enhance the Performance and Appearance of Die Castings

2026-02-26

Want to give aluminum alloy die casting a high hardness, wear-resistant and corrosion-resistant and colorful surface? This article is an in-depth analysis of the principle, advantages, process and application of PVD coating, and provide you with professional technical consulting and sampling services.

The Complete Guide to Aluminum Thunder Carving: Principles, Processes, Applications & FAQs

2026-02-25

In the rapid development of metal surface treatment technology today, aluminum alloy laser engraving (also known as laser engraving) with its high precision, non-polluting, permanent pattern unique advantages, is rapidly replacing the traditional screen printing, pad printing and chemical etching, consumer electronics, automotive manufacturing, aerospace and other areas of the first choice of marking and decorative processes. The so-called laser engraving, refers to the use of high energy density laser beam irradiation of the material surface, through the photothermal effect so that the material instantly melting, vaporization or discoloration, thus leaving a permanent marking processing method. Compared with chemical etching, it requires no consumables, no waste liquid emission; compared with mechanical engraving, it has no tool wear, can process any complex pattern. This article will provide you with a comprehensive guide to aluminum alloy laser engraving, covering the basic principles, main types of effects, detailed process flow...

The Complete Guide to Aluminum Etching: Processes, Methods, Applications and FAQs

2026-02-23

In the world of metalworking, aluminum etching is an ancient and modern precision machining technology. From the heat sink inside a smartphone, to the lightweight structural parts on an aircraft, to the beautiful metal nameplates, the aluminum etching process is ubiquitous. The so-called etching refers to the process of selectively dissolving metallic materials through chemical or electrochemical methods, thereby forming a precise pattern, text or specific structure on the surface of the workpiece. Aluminum alloy is one of the most commonly used materials in etching processes due to its low density, good electrical and thermal conductivity, and excellent processability. This article will provide you with a comprehensive guide to aluminum alloy etching, covering the basic principles, main methods, detailed process flow, quality control, solutions to common problems, and application examples. Whether you are an engineer, designer, or interested in...

A Comprehensive Guide to Plating Processes: Principles, Types, Applications and FAQs

2026-02-14

1. Introduction Electroplating is a time-honored surface treatment technology that deposits a metallic layer on the surface of a substrate material by means of electrochemical principles in order to meet corrosion protection, decoration or functional requirements. Since its birth in the 19th century, electroplating technology has evolved from purely protective and decorative to a precision process capable of providing specific functions such as electrical, magnetic, optical and thermal. According to the function of the plating, plating can be divided into three main categories: The plated material can be metallic or non-metallic (e.g. plastic plating). The purpose of this article is to provide an authoritative and comprehensive guide to electroplating knowledge to help readers gain a deeper understanding of the plating process, select the appropriate program, and answer frequently asked questions. 2. Basic Principles of Electroplating 2.1 Electrochemical Basis Electroplating is the electrolytic action in a solution containing the metal ions to be plated, with the plated material or product as the cathode,...

The Complete Guide to Aluminum Anodizing: From Principles, Common Defects to Hole Sealing Process Analysis

2026-02-13

1, Introduction The thickness of the oxide film formed by aluminum alloy in the natural environment is only 0.01～0.1μm, which is insufficient for protection and cannot meet the requirements of corrosion resistance, wear resistance and decorativeness for engineering applications. Anodic oxidation is currently the most widely used aluminum alloy surface strengthening technology, through the electrochemical reaction on the surface of the aluminum substrate to generate aluminum oxide (Al₂O₃) film layer. The film layer is firmly bonded to the substrate, with high hardness, and can be colored and sealed due to its porous structure. However, the actual production of the film layer is often white, chalking, pinch marks too deep, localized no film and other defects. The causes of these problems involve multiple variables, such as alloy composition, pretreatment quality, electrolyte parameters, clamping methods and operating practices. This paper takes sulfuric acid anodizing as the main line and refers to the "Aluminum Alloy Surface Oxidation Treatment Q&A" (Zheng Ruiting...

Chrome-free surface passivation for aluminum alloys

2025-05-29

Aluminum alloys are widely used in aerospace, automotive, electronics and other fields due to their light weight, high strength and corrosion resistance. However, the traditional chromate passivation process has been strictly limited by international environmental regulations due to the high toxicity and serious pollution of hexavalent chromium. In this paper, the research on chromium-free passivation technology is carried out to explore the film-forming mechanism of silane/rare earth salt composite system, to improve the corrosion resistance of passivation film by optimizing the process parameters, and to analyze its environmental protection and economic value, so as to provide theoretical and technical references for the alternative chromate process. From this paper, we can learn: The application of aluminum is the highest production of non-ferrous metals, the most widely used metal materials. In the metal structural materials, its production is second only to steel. All-Aluminum Engines The advantage of a cast aluminum block is that it is lightweight,...

Plastic spraying process and its characteristics

2025-03-10

The process principle of plastic spraying Electrostatic powder coating technology through high-voltage electrostatic adsorption to achieve high efficiency coating. The core process is: compressed air will be powder coating conveyed to the electrostatic spray gun, the muzzle of the high-voltage generator produces 80-100kV static field triggered corona discharge, so that the atomized powder charged; charged particles in the electric field under the action of directional adsorption on the surface of the grounded workpiece, along with the thickening of the coating to form a charge buildup, the uniformity of the film through the homogeneous static repulsive autonomy control; and ultimately, the formation of dense film by the high-temperature curing to complete the whole process of industrialized application from powder adsorption to coating formation. The whole process from powder adsorption to coating molding is completed. Workflow Process Name Purpose of Process and Detailed Steps Related Equipment Related Materials 1. Pre-treatment Purpose: To remove the pollutants on the surface of the workpiece and form a phosphate layer that prevents rust and enhances adhesion Detailed Steps: ① Degreasing: Acid...

Sand blasting

2024-10-27

Sandblasting is a common surface treatment method used in the manufacture of aluminum alloy products and CNC machining production. In this article, I will detail the principles, application methods, advantages and disadvantages of the sandblasting process. What is sandblasting? Sandblasting is a surface treatment technology powered by compressed air to form a high-speed jet beam, the jet (such as sand, pearl salt, sodium bicarbonate, glycine powder, silver, etc.) high-speed jet to the surface of the workpiece or object to be treated. The beaded medium is guided to the surface of the material. The target surface is smooth, clean and shiny by friction reaction. Sandblasting is a traditional and time-consuming process for large and complex materials with different shapes. As a result, the concept of sandblasting was patented and introduced in the United States in 1870. The concept of sandblasting comes from the natural phenomenon of sand erosion caused by dust in desert areas. Sandblasting is used to...

Aluminum surface treatment process

2024-10-21

Aluminum surface treatment process can be divided into: Aluminum surface treatment process have those? I. Polishing Polishing is a common aluminum processing method, designed to reduce the roughness of the surface of the workpiece through mechanical, chemical or electrochemical action, so as to obtain a bright and flat surface. This processing method mainly utilizes polishing tools and abrasive particles or other polishing media to modify the surface of the workpiece. The main purpose of polishing is not to improve the dimensional or geometrical accuracy of the workpiece, but rather to focus on obtaining a smooth surface or mirror shine. In some cases, polishing is also used to eliminate luster, i.e., matting. A common tool used in the polishing process is the polishing wheel, which is usually made of multiple layers of canvas, felt or leather laminated together and clamped on both sides by a circular metal plate. The rim of the polishing wheel is coated with a polishing compound, which...

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