How to Select Metal Surface Treatment Processes? A Selection Guide Based on Service Environments

Metal and plastic workpieces feature vastly different material properties, and their paint coatings cannot be used interchangeably. Improper coating selection may trigger defects including poor adhesion, paint peeling, cracking, yellowing and insufficient corrosion resistance. When conducting metal‑plastic coating processing, enterprises shall make scientific selections according to substrate material, service environment, functional requirements and appearance standards. Balancing paint‑film adhesion, durability and visual quality helps cut rework costs and improve finished‑product qualification rates.

Classification, Principles and Industrial Application Summary of Metal Surface Treatment Processes

Metal surface treatment is a basic supporting process for industrial precision manufacturing. It modifies the surface layer of metal workpieces through physical, chemical or mechanical means to effectively eliminate surface defects, optimize material properties and enhance appearance texture. This process solves common industrial pain points of metals such as easy corrosion, oxidation, rough surface and poor wear resistance, greatly extending the service life of workpieces and increasing product added value. It is widely applied in numerous industrial fields including hardware, machinery, molds, auto parts and precision equipment.

There are various metal surface treatment processes, including polishing and grinding, sandblasting, anodizing, electroplating, spraying and passivation, each with unique advantages and limitations. Many enterprises choose processes blindly without considering workpiece materials, service environments and functional requirements, resulting in insufficient corrosion resistance, inconsistent appearance, cost waste and unqualified products. Comparing mainstream processes and selecting solutions according to actual needs is the key to improving product quality and controlling production costs.

Driven by upgraded industrial standards, customized coating for hardware, metal and plastic composite parts has become mainstream. It is an all-in-one surface treatment solution for chassis shells, fasteners and home appliance parts, integrating anti-corrosion, wear resistance and personalized coloring for indoor and outdoor industrial scenarios.

Metal and plastic coating is a mainstream industrial surface treatment process, widely used for hardware, home appliances, plastic parts, mechanical equipment and other workpieces. It mainly includes four major processes: electrostatic powder coating, liquid painting, baking painting and UV coating. Each process adapts to different materials and application scenarios. Standard spraying procedures are essential to ensure uniform, firm and weather-resistant coatings.