Passivation Agent Product Line
Ultra-corrosion-resistant trivalent blue-white passivator
An environmentally friendly trivalent chromium blue‑white passivation agent for zinc plating, widely used in the automotive, toy, and electronics industries. The undiluted formulation is free of hexavalent chromium and passes the boiling water test, meeting IEC 62321 standards.
Employing innovative materials and processes, it breaks through the limitations of conventional trivalent chromium blue‑white zinc coatings. Acid zinc barrel plating achieves a NSS test duration of over 96 hours, while cyanide‑free alkaline zinc rack plating withstands NSS testing for up to 300 hours.
It offers a broad operating window with a wide pH range, allowing use from low to ambient temperatures. The resulting blue‑white finish is uniform and aesthetically pleasing, resisting yellowing even after prolonged storage.
The passivation process features slow zinc dissolution, enabling excellent corrosion resistance even with thin coatings. The bath exhibits high tolerance to impurities, extending the replenishment cycle, and is suitable for various zinc‑plated substrates—whether applied by barrel or rack plating, on automated lines or manually—and is particularly well‑suited for automated rack‑plating systems.
Ultra-corrosion-resistant trivalent color zinc passivator
An environmentally friendly trivalent chromium‑based colored passivation agent, widely used in the automotive, toy, and electronics industries. The undiluted formulation contains no hexavalent chromium and passes the boiling water test, meeting IEC 62321 standards.
Its innovative process delivers exceptional corrosion resistance: acid zinc barrel plating achieves a NSS test duration of up to 150 hours, while cyanide‑free alkaline zinc rack plating withstands NSS testing for as long as 500 hours.
The passivation process features slow zinc dissolution, yielding thin coatings with excellent corrosion resistance, high tolerance to impurities in the bath, and extended replacement intervals.
Suitable for all types of zinc‑plated substrates, the passivation film exhibits a color shift over time—from reddish‑yellow to reddish‑green—resulting in a rich, uniform appearance and brilliant luster. It is compatible with both barrel and rack plating, and can be applied on manual or automated production lines.
HL-211A Acid Zinc Trivalent Chromium Nickel-Free Black Zinc Passivator
An environmentally friendly, single‑component trivalent chromium black passivation agent suitable for potassium chloride–based zinc plating. It offers a broad process window, simple operation, and easy maintenance, and is widely used in the automotive, electronics, and toy industries. The undiluted formulation contains no hexavalent chromium or nickel salts and complies with IEC 62321 standards.
It forms a uniform, deep‑black, highly protective passivation film on the zinc‑plated surface, with a glossy, jet‑black finish. Suitable for potassium chloride–based acidic zinc plating, it can be applied via barrel or rack plating; during barrel‑type or robotic arm‑assisted passivation, it also helps to repair surface marks caused by impact and friction.
In neutral salt spray testing, it delivers a white‑rust resistance of 48 to 120 hours, and its wastewater treatment is straightforward.
HL-212 Trivalent Chromium Black Zinc Passivator
An environmentally friendly trivalent chromium black‑zinc passivation agent suitable for cyanide‑free alkaline zinc plating, widely used in the automotive, electronics, and toy industries. The undiluted solution contains no hexavalent chromium and complies with IEC 62321 standards.
It exhibits virtually no selectivity toward different types of zinc‑plating additives on the market. After treatment, the coating is bright black with excellent adhesion; when used in conjunction with a black‑zinc sealing agent, it delivers a uniform, glossy black finish, passing the neutral salt spray test for over 200 hours.
Suitable for both rack plating and barrel plating, it is extremely easy to use. Even when the passivation time significantly exceeds the upper limit, the passivation film retains its black appearance until the coating has fully dissolved.
HL-230 High-Corrosion-Resistant Zinc-Nickel Alloy Trivalent Chromium Blue Passivator
The plating solution contains no hexavalent chromium and exhibits excellent corrosion resistance, making it widely applicable in the automotive, electronics, and other industries; it complies with IEC 62321 standards.
The passivation film demonstrates superior thermal stability, maintaining outstanding corrosion resistance even after high‑temperature treatment.
It produces a uniform, vibrant blue to cyan‑blue passivation layer, can be operated at room temperature, and is suitable for both rack plating and barrel plating.
When the nickel content is 10–15% and the coating thickness is not less than 8 µm, neutral salt spray testing yields no white rust after 200 hours and no red rust after more than 1,000 hours; further enhanced corrosion resistance is achieved when used in conjunction with the HL‑218 sealing agent.
HL-232 Zinc-Nickel Alloy Trivalent Chromium Color Passivation Agent
The undiluted solution contains no hexavalent chromium and exhibits excellent corrosion resistance, making it widely applicable in the automotive, electronics, and other industries; it complies with IEC 62321 standards.
The passivation film demonstrates high thermal stability, with corrosion resistance remaining unaffected even after high‑temperature treatment.
The passivator offers stable performance and a long service life, suitable for both rack plating and barrel plating.
HL-233 Zinc-Nickel Alloy Trivalent Chromium Black Passivation Agent
An environmentally friendly trivalent chromium black passivation agent for zinc–nickel alloys, widely used in the automotive, electronics, and toy industries; the undiluted formulation is free of hexavalent chromium.
The resulting coating exhibits excellent blackness and uniformity, with minimal color variation. When used in conjunction with the water-based sealant HL‑218 or the zinc‑black‑specific sealant HL‑220, it delivers a uniformly black, glossy finish and outstanding corrosion resistance, making it suitable for both barrel and rack plating processes.
HL-235 Zinc-Nickel Alloy Trivalent Chromium Clear Passivation Agent
The plating solution contains no hexavalent chromium and exhibits excellent corrosion resistance, making it widely applicable in the automotive, electronics, and other industries; it complies with IEC 62321 standards.
It produces a uniform, naturally colored passivation film, operates at room temperature, and is suitable for both rack plating and barrel plating.
When the nickel content is 10–15% and the coating thickness is at least 8 μm, neutral salt spray testing yields no white rust after 200–500 hours and no red rust after more than 1,000 hours. Combined with the HL‑218 sealant, it delivers outstanding corrosion resistance.
Leading the innovative development of environmentally friendly electroplating chemicals!
Guangdong Haolun
Address: 360 meters northwest of the intersection of Xiaocui Road and Huanshi North Road, Rongcheng District, Jieyang City, Guangdong Province, CaiRun Building, Guangdong Haolun Environmental Protection Technology Co., Ltd.