Engineered to deliver exceptional corrosion resistance, superior surface gloss, and absolute functional reliability for demanding environments.
Established as a premier technological hub, SUZHOU HIYIE CHEMICAL Co., Ltd. designs, manufactures, and distributes world-class metal finishing additives, electroplating specialties, and organic polymer auxiliary systems. Serving electronics, telecommunications, semiconductor architectures, and heavy duty automotive platforms, we solve complex surface engineering puzzles for modern manufacturers.
Through our dedicated R&D nodes in Wuhan and Shanghai, combined with joint university labs, Hiyie Chemical bridges fundamental academic research and real-world shop floor processes. Our extensive supply footprint covers key industrial zones in the Yangtze River Delta, Pearl River Delta, and Bohai Rim, extending globally to power Tier-1 electronic and automotive OEMs.
An in-depth chemical and operational white paper examining modern zinc-nickel alloy coatings, electroless nickel deposits, and eco-friendly trivalent passivation.
Under modern structural demands, conventional zinc coatings fall short. Our 6185 Alkaline Zinc-Nickel Plating system provides an engineered coating deposit containing 12% to 16% nickel. This precise stoichiometric ratio creates a gamma-phase crystalline structure that exhibits five to ten times the corrosion resistance of standard zinc coatings. The alkaline bath formulation ensures exceptional thickness distribution, preventing over-deposition on high-current density edges and under-plating inside deep recessed channels or blind holes.
By incorporating state-of-the-art complexing agents, our bath solutions remain highly stable and resistant to carbonate build-up, significantly extending bath lifespans and reducing waste treatment overheads. This chemical approach makes it the default specification for automotive brake calipers, fastener groups, and sub-chassis assemblies exposed to severe thermal stress and de-icing salts.
Electroless nickel deposits provide barrier protection by building a uniform coating across complex geometries without current distribution issues. Our portfolio spans ultra-low, medium, and high phosphorus formulations. The J0-1 Ultra-Low Phosphorus Electroless Nickel delivers maximum deposit hardness (up to 700 HV as-plated, and up to 1000 HV after heat treatment) and excellent solderability, critical for connector pins in high-frequency 5G hardware and electronic casing shields.
Conversely, our HITEC EN 6786 High Phosphorus chemistry (containing 10.5% to 12% P) deposits an entirely amorphous, non-magnetic nickel layer. The lack of grain boundaries in the amorphous phase eliminates localized galvanic corrosion, allowing the deposit to withstand highly acidic environments, petrochemical media, and marine salt spray test regimes. The HITEC EN 6713 Mid Phosphorus system balances ductility, speed, and wear resistance, serving as a reliable choice for general machine components.
Environmental directives like RoHS, REACH, and WEEE have phased out hexavalent chromium due to its high toxicity. Hiyie Chemical has been at the forefront of this transition, developing advanced trivalent chromium technologies. Our 216 High Corrosion-Resistant Iridescent Trivalent Passivation creates a durable organometallic conversion film directly on zinc and zinc-alloy deposits. This trivalent layer features self-healing capabilities that prevent rust creep when the coated component suffers minor mechanical abrasions.
When paired with our ZN-318 Blue Trivalent Passivation and functional sealers, the coating system regularly achieves over 1000 hours to red rust in Neutral Salt Spray (NSS) testing. This matches or exceeds the performance of traditional hexavalent systems while meeting global environmental compliance standards for modern export manufacturing.
Electroplating reliability starts at the base preparation. Our 372 Alkaline Cyanide-Free Copper Plating provides a safer, eco-friendly copper strike bath that replaces hazardous cyanide processes without sacrificing adhesion on steel, brass, zinc die-castings, and aluminum substrates. It deposits a fine-grained, ductile copper layer that serves as a barrier, preventing zinc diffusion into subsequent nickel coatings.
For decorative and functional chromium layers, our Chrome Plating Carrier 105 aids wetting, mist suppression, and deposit uniformity across complex geometries. By managing surface tension and polarization curves within the bath, it ensures brilliant chrome finishes free of burning, pitting, or micro-cracking.
Leveraging China's manufacturing ecosystems to deliver robust, high-performance surface treatment technologies worldwide.
We employ a dedicated engineering and field support staff to assist clients with line startup, chemistry monitoring, and bath maintenance.
Our labs in Suzhou, Shanghai, and Wuhan develop customized chemical formulations tailored to specific customer specifications and environmental conditions.
We prioritize green chemistry, developing cyanide-free plating baths and high-performance trivalent passivations that meet RoHS and REACH standards.
Our sales and support teams assist global distributors and local plants with bath troubleshooting and quality optimization.
Sourcing surface finishing chemicals from Hiyie Chemical in Suzhou provides key supply chain advantages. Located in the Yangtze River Delta, we benefit from a dense network of raw material suppliers, research institutes, and logistics providers. This proximity helps us maintain low raw material costs and short lead times compared to Western chemical suppliers.
Our state-of-the-art manufacturing facilities utilize automated reactor systems to ensure batch-to-batch consistency. We maintain direct control over chemical formulation, packaging, and shipping, allowing us to supply large volumes of plating additives globally. Our compliance with strict environmental regulations ensures long-term operational security and uninterrupted supply to our customers.
From microelectronics to heavy-duty automotive hardware, our specialized coatings protect critical components worldwide.
Modern vehicles require high corrosion resistance due to road salt exposure and thermal cycling. Our alkaline zinc-nickel processes are designed for brake components, under-hood engine brackets, and chassis fasteners. They provide excellent corrosion protection (over 1000 hours NSS) without hydrogen embrittlement risks, helping tier-1 automotive suppliers meet strict quality standards.
5G base stations, smartphones, and computers require high wear resistance and electrical conductivity. Our J0-1 Ultra-Low Phosphorus Electroless Nickel deposits provide a hard, wear-resistant coating with excellent solderability. These coatings protect copper traces and connectors while maintaining stable signal transmission in high-frequency applications.
Semiconductor manufacturing equipment operates in highly corrosive environments. Our HITEC EN high-phosphorus electroless nickel coatings offer a dense, amorphous barrier layer that resists aggressive chemical vapors and outgassing under high vacuum, protecting delicate equipment components from degradation.
Strategic information for procurement departments, compliance teams, and design engineers.
The metal finishing industry is shifting toward safer, more sustainable chemistries. Key trends driving this transition include:
Hiyie Chemical helps global procurement teams manage supply risks, control costs, and maintain compliance through:
Read about our latest research, product developments, and company milestones.
As we mark another year of growth, Hiyie Chemical remains focused on developing advanced surface treatment solutions. We continue to invest in our Wuhan and Shanghai R&D facilities, working alongside academic partners to address technical challenges in electronics and automotive electroplating.
Our focus for the coming year is expanding our portfolio of trivalent chromium passivations and cyanide-free plating baths, helping our global customers meet increasingly stringent environmental regulations.
Technical guidance and application advice from our electroplating and chemical engineering experts.
Zinc-nickel alloy plating (containing 12-16% Ni) provides significantly better corrosion protection than pure zinc. The gamma-phase crystal structure of the alloy corrodes much slower, regularly achieving over 1000 hours in neutral salt spray tests before red rust appears. It also offers greater resistance to high temperatures and mechanical wear, making it a reliable choice for under-hood automotive applications.
Our trivalent chromium passivations, such as 216 and ZN-318, do not contain hexavalent chromium (Cr6+). They rely on trivalent chromium (Cr3+) to form a stable, protective conversion layer on the plated metal. These products comply with all European REACH, RoHS, and WEEE directives, allowing manufacturers to export finished goods to European and North American markets.
The phosphorus content determines the deposit's structure and performance properties. Low phosphorus (1-3% P) deposits have high as-plated hardness and wear resistance. Medium phosphorus (6-9% P) offers a balance of hardness, brightness, and corrosion resistance. High phosphorus (10-12% P) deposits form an amorphous, non-magnetic layer with exceptional resistance to chemical attack and acidic environments.
Our 372 Alkaline Cyanide-Free Copper Plating provides a safer working environment and simplifies wastewater treatment by eliminating free cyanide. The bath produces a fine-grained, ductile copper deposit with excellent adhesion on steel, brass, and zinc die-castings, serving as a reliable alternative to traditional cyanide strike baths.
Pitting is usually caused by hydrogen bubbles sticking to the cathode surface, often due to high surface tension or organic contamination. This can be resolved by adding wetting agents or air agitation. Burning occurs at high current densities when metal ions in the cathode film are depleted; this can be corrected by reducing the current density, increasing metal concentration, or using carrier additives like Chrome Plating Carrier 105.
Yes. We supply specialized additives formulated for different plating methods. For example, 1149 Barrel Bright Nickel Plating is designed to handle the variable current distribution and mechanical movement of barrel systems, while our other bright nickel processes are optimized for rack lines to ensure uniform thickness and brightness.
Our alkaline zinc-nickel formulations have high cathode current efficiency, which reduces hydrogen generation during plating. For high-strength steel components (typically over 1000 MPa tensile strength), we recommend a post-plating baking step (typically at 200°C for 4 hours) to drive out any hydrogen before applying the passivation layer.
We offer comprehensive technical support, including bath analysis, hull cell testing, and customized chemical development. Our R&D teams in Suzhou and Shanghai can analyze customer substrates and adjust our additive packages to suit specific water qualities, temperature conditions, and target performance requirements.
Most of our electroplating additives, stabilizers, and carrier chemicals have a shelf life of 12 to 24 months when stored in their original sealed containers in a cool, dry place away from direct sunlight and extreme temperatures.
We work with international logistics providers to handle hazardous and non-hazardous chemical transport. We provide complete documentation, including SDS, COA, and custom clearances, to ensure safe and timely delivery to your production facility.
We maintain a comprehensive portfolio of surface treatment chemicals, passivations, and auxiliary carriers.
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