JC Grand customers can choose from a large selection of coatings, platings and other surface treatments. All zinc electroplating, both hexavalent and trivalent (RoHS compliant), is performed by JC Grand factories. All other coatings are performed by qualified factories that specialize in the respective coating.
The primary goal is to match customer's performance and price requirements, every time. The most popular surface treatments are shown below.
Zinc Electroplating
The workhorse coating of the fastener industry. Zinc electroplating involves immersion of the items to be coated in a solution containing zinc ions and applying an electric current to uniformly coat the surface.
Coating characteristics: Zinc electroplated coatings are bright coatings that are thin - typically around 3-20 microns and are not suitable for exterior use where durability is required. Heavy chromate coatings are frequently applied to zinc platings to improve their durability, especially for fastener applications.
Colors: Clear, Yellow, Black, Blue, Green, Red
Phosphate Coatings
A popular type of chemical conversion coating, especially for drywall (and similar) screws.
Ruspert (Ceramic)
Ruspert metal finish is a high-grade metal surface processing technology that prevents corrosion. It consists of three layers: a metallic zinc layer, a high-grade anti-corrosion chemical conversion film, and a baked ceramic surface coating.
* Steel substrate
* Metallic zinc layer (3µm)
* Chemical conversion coating layer (2µm)
* Baked ceramic surface coating layer (10µm)
Choose between 500-1000 hours of salt spray corrosion resistance, and a variety of colors (shown below).
Dacromet
A leading water-based inorganic metal finishing system that is an alternative to both electro and mechanical platings and solvent-based organics. Dacromet, with or without optional sealers and topcoats, can be applied to a variety of substrates in order to provide corrosion protection to ferrous metals.
Magni
The Magni 500 Series of coatings extend fastener life by eliminating corrosion. In addition to corrosion control, Magni coatings also provide lubricity and conductivity, which can also improve product performance. Magni manufactures both solvent and waterborne liquid coatings used for rust prevention on metal surfaces.
Our most ordered Magni formulations are shown below. Other versions are available upon request.
Mechanical Zinc
Mechanical plating involves tumbling the items to be coated in zinc (and sometimes tin) powder with glass beads and special reducing agents to bond the zinc particles to the steel surface.
Hot Dip Galvanize
General or hot dip galvanizing involves preparing work by acid pickling in batches or on jigs and then dipping the work into a bath of molten zinc.
Coating characteristics: The typical general galvanized coating ranges from 65 microns to over 300 microns depending on the steel analysis, thickness of material and immersion time in the galvanizing bath. Typical coating thickness on most general galvanized products is 80-100 microns.
Oxide Coatings
The oxide coatings are in fact corrosion products which is a thin, usually less than 2.5 µm oxide with good adhesion. The oxide treatments are done by heat, chemicals, or electrochemical reactions.
- Black oxide treatments are done by proprietary chemicals. Some pastes can be rubbed on surfaces to produce similar results. Black oxide can be applied on steel, copper, and most stainless steel.
