Electrochemical finishing for stainless steel, uniform and stress free
Guoshuo provides stainless steel electropolishing and electrolytic passivation. Electropolishing is an electrochemical process that dissolves the microscopic peaks on a surface, essentially plating in reverse. The result is stainless steel that is brighter, more corrosion resistant, and easier to clean.
Compared with mechanical polishing, electropolishing is uniform, leaves no residual stress, and reaches recesses and complex geometry that a buffing wheel cannot touch. It is widely used on foodservice equipment, medical components, and decorative hardware.
Process Highlights
- Higher surface finish and brightness
- Improved corrosion resistance, easier to clean and resists fouling
- Uniform and stress free, ideal for complex shapes and batch work
- Environmentally controlled electrolytic process
Materials & Applications
Base materials: 304, 316, and other common stainless steel grades
Typical applications: Foodservice equipment and kitchenware, medical components, hardware fittings, decorative parts
Process Flow
- Incoming inspection and requirement review
- Pretreatment and cleaning
- Electropolishing or passivation
- Neutralizing and rinsing
- Inspection and shipment
Quality & Certification
Salt spray testing (up to 72 hours) and coating-thickness measurement can be arranged on request. We can plate to US FDA and German LFGB food-contact standards and meet RoHS hazardous-substance requirements. Exact process parameters, such as thickness range and salt spray duration, are confirmed at the quotation and sampling stage.
Frequently Asked Questions
How is electropolishing different from mechanical polishing?
Electropolishing dissolves the surface electrochemically, so it is uniform, stress free, and reaches complex geometry. Mechanical polishing removes material physically and struggles to reach recesses evenly. The two are often combined: mechanical polishing to level the surface, electropolishing to finish it.
Does electropolishing improve corrosion resistance?
Yes. It removes surface defects and embedded contaminants and leaves a cleaner, more uniform passive layer, which measurably improves corrosion resistance.
Which stainless grades can you process?
Common austenitic grades such as 304 and 316. We confirm on an incoming sample before committing to a process route.