Hangzhou Qianjiang Chain Industries Co., Ltd. introduces you to Dacromet/Special Coated Roller Chains

Core characteristics of Dacromet/Special Coated Roller Chains produced by Hangzhou Qianjiang Chain Industries Co., Ltd.:

I. Dacromet Coated Roller Chains (Zinc-Chromium Coating)

1. Extremely Strong Corrosion and Rust Resistance

- Excellent salt spray resistance, achieving 1000-2000 hours in neutral salt spray tests, far superior to ordinary galvanized and blackened chains.

- High temperature resistance, humid heat resistance, acid and alkali resistance, not prone to rusting, whitening, or corrosion.

- Suitable for outdoor, humid, salt spray, mining, chemical, and high-salt coastal environments.

2. Coating Characteristics

- Thin coating with strong adhesion, does not affect chain fit accuracy or pin flexibility.

- Moderate coating hardness, wear-resistant, not easy to peel off, low friction loss.

- No risk of hydrogen embrittlement, high-strength chain is not easy to break, high safety.

3. Appearance and Performance

- Silver-gray matte finish, good decorative appeal

- Heat resistance up to approximately 300℃, usable in short-term high-temperature environments

- Good lubrication, suitable for high-speed and medium-low speed transmissions

II. Characteristics of Other Common Specially Coated Roller Chains

1. Nickel-plated Chains

- Bright silver-white, rust resistance superior to ordinary zinc plating, slightly inferior to Dacromet

- Resistant to weak acids and alkalis, suitable for food machinery, medical equipment, and mildly corrosive environments

- Smooth and aesthetically pleasing surface, good electrical conductivity

2. Zinc-plated (hot-dip/electroplated) Chains

- Low cost, basic rust prevention, withstands neutral salt spray for tens of hours

- Suitable for mildly humid environments, easily corroded by salt spray, strong acids, and strong alkalis

3. Blackened + Oil-impregnated Chains

- Lowest cost, moderate rust resistance, mainly used in dry indoor environments

Good wear resistance, suitable for general industrial transmission.

III. Overall Advantages of Dacromet Chains

1. Ultra-long corrosion resistance, 3-10 times longer service life in harsh environments than ordinary chains.

2. Strength, toughness, and wear resistance remain unchanged, without reducing the chain's mechanical properties.

3. Resistant to high and low temperatures, salt spray, and mold, suitable for mining, ports, agricultural machinery, and outdoor equipment.

4. Environmentally friendly Dacromet (chromium-free) meets environmental protection requirements and is free of heavy metal pollution.

IV. Disadvantages

- Higher price than ordinary galvanized or blackened chains.

- Coating is not suitable for long-term immersion in strong acids and alkalis.