Special powder coatings

Key Characteristics of Heavy-Duty Coatings：

① Long-Term Corrosion Protection in Harsh Environments

Heavy-duty coatings are designed for service under extremely harsh conditions and provide long-lasting corrosion protection.

In chemical industrial atmospheres and marine environments, they typically offer a service life of 10 to 15 years or longer.

Even when exposed to acidic, alkaline, saline, or solvent media, and under certain temperature conditions, heavy-duty coatings can still maintain effective corrosion protection for more than 5 years.

② Thick-Film Application as a Defining Feature

Thick-film capability is one of the most important characteristics of heavy-duty coatings.

Conventional anticorrosive coatings generally have a dry film thickness (DFT) of approximately 100–150 μm.

Heavy-duty coatings typically have a DFT of 200–300 μm or more.

In some applications, coating thickness can reach 500–1000 μm, and in extreme cases, even up to 2000 μm.

The significantly increased film thickness provides enhanced barrier protection, chemical resistance, and extended service life.

Heavy-Duty Coatings：

Heavy-duty coatings are specialized protective coatings designed for long-term service in harsh corrosive environments, including exposure to acids, alkalis, salts, and aggressive chemical atmospheres.

The dry film thickness (DFT) typically exceeds 200 μm, and in marine environments, the corrosion protection lifetime can reach 10–15 years.

Technical Characteristics：

The technology of heavy-duty coatings involves:

Synthesis of highly corrosion-resistant resins

Application of high-efficiency dispersants and rheology modifiers

Development of anti-permeation and barrier pigments

Application control and coating performance monitoring technologies

These technologies collectively ensure excellent durability, barrier protection, and long-term anticorrosive performance.

Major Types of Heavy-Duty Coatings：

Heavy-duty coatings generally fall into nine major categories, including:

Epoxy coatings

Vinyl chloride coatings

Chlorinated rubber coatings

Acrylic coatings

Fluorocarbon coatings

Alkyd coatings

Silicone heat-resistant coatings

Solvent-free anticorrosive coatings

Special-purpose anticorrosive coatings

Application Fields：

Heavy-duty coatings are widely used in:

Marine engineering

Petrochemical and chemical industries

Bridges, tunnels, and large steel structures

Surface preparation must comply with Sa / St rust removal grade standards prior to coating application.

Technical indicators：

Test Item	Technical Requirement	Test Result	Conclusion	Remarks
Bonding Strength(to cement mortar)	≥ 1 MPa	≥ 2.5 MPa	Pass	—
Water Absorption(24 h immersion)	≤ 1%	0.40%	Pass	—
Heat Resistance	250 °C ± 5 °C, constant temperature for 1 h; no visible surface change after cooling	No visible surface change	Pass	Type I requirement
Corrosion Resistance	20 °C ± 5 °C, 30 days immersion in 40% sulfuric acid; no cracking, blistering, or peeling	No cracking, blistering, or peeling	Pass	Type I requirement
Thermal Shock Resistance(Rapid heating & cooling)	250 °C ± 5 °C / 23 °C ± 2 °C with forced air, each held for 1 h, 5 cycles; no cracking, blistering, or peeling	No cracking, blistering, or peeling	Pass	Type I requirement

Product Categories of Heavy-Duty & Industrial Coatings：

【Epoxy Coatings】

Thick-film epoxy zinc-rich primer

Epoxy micaceous iron oxide (MIO) anticorrosive coating

Epoxy glass flake coating

Epoxy coal tar coating

Epoxy floor coating

【Vinyl Chloride Coatings】

Vinyl chloride primer

Vinyl chloride topcoat

Machine tool coating

Hammer finish coating

Fire-retardant coating

Anticorrosive coating

Clear varnish

Perchloroethylene putty

【Chlorinated Rubber Coatings】

Chlorinated rubber topcoats (various colors)

Chlorinated rubber aluminum-pigmented anticorrosive primer

Chlorinated rubber anticorrosive primer

Chlorinated rubber iron oxide red aluminum-pigmented anticorrosive coating

Chlorinated rubber antifouling bottom paint

【Acrylic Coatings】

Acrylic polyurethane clear topcoat

Acrylic polyurethane enamel (various colors)

Acrylic road marking paint

【Fluorocarbon (PVDF) Coatings】

Fluorocarbon anticorrosive coatings (various colors)

Metallic fluorocarbon coatings

Fluorocarbon exterior wall coatings

【Alkyd Coatings】

Alkyd micaceous iron oxide anticorrosive coating

Alkyd ship hull coatings (various colors)

Alkyd enamel coatings (various colors)

【Silicone Heat-Resistant Coatings】

Silicone air-drying coatings (various colors)

Silicone baking coatings (various colors)

Silicone heat-resistant insulating coating

Aluminum-pigmented heat-resistant coating

Muffler heat-resistant coating

【Solvent-Free Anticorrosive Coatings】

Solvent-free epoxy glass flake heavy-duty anticorrosive coating

Solvent-free epoxy coal tar coating

Solvent-free low-friction internal pipeline coating

Solvent-free self-leveling floor coating

【Special Anticorrosive Coatings】

Vinyl phosphate primer

Inorganic zinc-rich primer

Waterborne inorganic zinc-rich primer

Glass coating

Formwork release coating

Application Areas：

① Emerging Marine Engineering

Offshore facilities

Coastal and bay structures

Offshore oil platforms

② Modern Transportation Systems

Highway guardrails

Bridges

Ships and boats

Containers

Trains and railway facilities

Automobiles

Airport facilities

③ Energy Industry

Hydraulic equipment

Water tanks

Oil refining equipment

Petroleum storage facilities (pipelines and storage tanks)

Power transmission and distribution equipment

Nuclear power facilities

Coal mining equipment

④ Large-Scale Industrial Enterprises

Papermaking equipment

Pharmaceutical equipment

Food and chemical processing equipment

Internal and external surfaces of metal containers

Chemical, steel, and petrochemical plant pipelines and storage tanks

Mining and smelting facilities

Cement plant equipment

Floors, walls, and concrete structures exposed to corrosive media

⑤ Municipal Infrastructure

Gas pipelines and related facilities (e.g. gas holders)

Natural gas pipelines

Drinking water facilities

Waste treatment equipment

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