Electroplating / Surface Treatment

Electroplating and surface treatment depend on bath chemistry that holds a stable metal-ion concentration, controlled pH, and a low contaminant load. Copper and nickel deposition — whether decorative bright finishing, functional engineering layers, or electroless pre-treatment — runs through degrease, acid activation, strike, and main plating stages. The salts that feed these baths are the variable most directly tied to deposit quality: ionic purity governs throwing power, current efficiency, and whether the layer plates out bright, ductile, and free of pitting or nodulation. Trace cations (Fe, Pb, Zn) and anion carry-over are the usual cause of haze, dull edges, and adhesion loss.

Cu(NO₃)₂·3H₂O and Ni(NO₃)₂·6H₂O sit at the makeup and replenishment point of the workflow. Nitrate salts are halide-free, so they let a plater build or top up a bath without uncontrolled Cl⁻ carry-over — useful for sulfamate or Watts-type nickel systems where chloride must stay within a tight window, and for chemistries where halide content is managed separately. Copper nitrate trihydrate feeds copper-strike and copper-bearing process chemistries for decorative and technical work; nickel nitrate hexahydrate supports bright-nickel, electroless, and surface-activation steps. Because deposit defects trace back to ppm-level impurities, grade selection should be specified by CAS number plus declared limits on Pb, Fe, and insolubles rather than by a single assay figure.

Grade choice follows the duty: decorative finishing and R&D bath formulation tolerate standard high-purity grades, while functional and low-defect applications justify tighter ppm thresholds and per-lot verification. Every lot should ship with a COA, and a Mill/Material Test Certificate to EN 10204 3.1 where a metallurgical-grade chain of evidence is required. Operations exporting plated stainless or EAF-route substrates into the EU should also retain CBAM embedded-emissions documentation for the metallic input upstream of the bath.

Supply runs on multi-regional sourcing held as Gebze bonded stock, with CIF Marmara delivery and lead times quoted per lot. Mixed nitrate and ancillary salt orders consolidate into a single shipment to cut freight handling. RFQs are returned with grade, packaging, and available quantity per lot.