Pre & Post Treatment Chemicals
In the pickling tank, first add one-third of the volume in water, then slowly introduce a measured amount of sulfuric acid and hydrochloric acid. Once the pickling solution has cooled to approximately 20°C, add JW‑855 acidic degreaser, and finally top up with water to the specified volume before use.
JW-856 Series Oil-Removal Powder
Our company’s 856 series degreasing powder has a pH of 10–12 and features rapid degreasing, high production efficiency, simple operation, ambient-temperature usability, energy savings, and strong specificity.
JW-811 Trivalent Chromium Silver-White Passivation Agent
Does not contain hexavalent chromium or oxidizing agents. SGS-certified.
JW-812B Trivalent Chromium Blue-White Passivation Agent
This product is formulated by blending multiple high-efficiency ionic surfactants, etchants, and other additives.
JW-813 Trivalent Chromium Blue-White Passivation Agent
JW-813 trivalent chromium blue-white passivation agent is an environmentally friendly passivation product; the passivation solution contains no hexavalent chromium.
JW-815 Trivalent Chromium Color Passivation Agent
W—815 trivalent chromium blue-white passivation agent is free of hexavalent chromium and oxidizing agents.
JW-816 High-Corrosion-Resistant Trivalent Chromium Color Passivation Agent
JW-816 high-corrosion-resistant trivalent chromium color‑passivating agent is an environmentally friendly passivation product; the passivation solution contains no hexavalent chromium.
JW-818 Trivalent Chromium Black Passivation Agent
This product is a single‑component, trivalent chromium black passivation agent suitable for potassium chloride–based acidic zinc plating. It is widely used in the automotive, electronics, and toy industries. The undiluted formulation contains no hexavalent chromium and complies with the IEC 62321 standard of the International Electrotechnical Commission.
JW-819 Trivalent Chromium Black Passivation Agent
Excellent corrosion resistance; when used in conjunction with a sealant, it achieves a neutral salt spray test duration of over 96 hours.
It can enhance the protective performance of various passivation films in neutral salt spray tests.
JW-891 Water-Soluble Zinc Plating Sealer
Free of hexavalent chromium and environmentally friendly. Excellent resistance to corrosion and discoloration.
JW-892 High-Performance Zinc-Coating Sealer
It is suitable for trivalent blue‑white passivation, non‑hexavalent yellow multicolor passivation, and trivalent black passivation; it can also be used for hexavalent yellow multicolor passivation and olive‑green passivation.