Overview of Surface Treatments and Metal Finishing Processes

This document provides a comprehensive list of metal surface treatments and finishing processes applicable to various substrates such as copper, aluminum, stainless steel, brass, and steel. It includes anodising, plating, pickling, deburring, polishing, passivation, coating, and complementary treatments.

1. Treatment Types and Applicability

• Anodising: Colourless and coloured sulphuric anodising, as well as colourless hard anodising, are available primarily for aluminum substrates.
• Plating: Copper plating, chemical nickel plating, polished electrolytic nickelling, sulfamic electrolytic nickelling, and tinning are offered with varying applicability across metals.
• Pickling and Cleaning: Pickling, washing, and US washing are used for surface preparation and cleaning, applicable to multiple substrates.
• Deburring: Heat and electrochemical deburring methods are listed for removing burrs and improving surface finish.
• Polishing: Pellet polishing, electrolytic polishing, barrel polishing deburring, and granulation enhance surface smoothness and appearance.
• Coatings and Passivation: Passivation treatments (including Finigard 105, Gleitmo, TNT UV, chromating with trivalent and hexavalent options), soap phosphate coating, zinc phosphate coatings, black zinc (without Chrome 6), black/white zinc iron plating, zinc nickel alkaline plating, acid and alkaline galvanizing without Chrome 6, and zinc flake Delta-proteck coatings are detailed.
• Teflon and Bonded Coatings: Teflon applications (Xylan, Delta-cool, Delta-seal in various colors) and bonded molybdenum coatings (Molykote) are available for enhanced surface properties.

2. Substrate and Process Compatibility

The treatments are categorized by substrate compatibility: copper, aluminum, stainless steel, brass, and steel. The document indicates which processes are suitable for rack or bulk treatment and for rotating types.

3. Complementary Treatments

• Degassing
• Hardening
• Deprocessing
• Medium-phosphorous and high-phosphorous treatments

4. Color Options and Special Finishes

Passivation and chromating treatments offer a wide range of colors including iridescent, white, red, black, blue, green, orange, purple, brown, yellow, gold, and grey, with options for special colors from a referenced table.

5. Contact and Company Information

The document includes contact details for quotations and inquiries, listing the company’s address, phone, fax, email, website, and legal information such as company registration and VAT numbers.

Critical Information and Best Practices

• Many zinc-based coatings and galvanizing processes are specified as "Without Chrome 6," indicating compliance with environmental and safety standards.
• Multiple finishing processes are available for both small production runs and bulk treatments, allowing flexibility depending on production scale.
• Specialized coatings like Delta-proteck zinc flake and bonded molybdenum provide enhanced friction and wear properties.
• Passivation and chromating treatments include both trivalent and hexavalent options, with a preference for environmentally safer trivalent processes.