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How Corrosion Resistant is PET Coated Iron Wire?

2026.04.16

Author：PET coated iron wire

The corrosion resistance of PET coated iron wire is one of its core advantages, primarily due to the polyethylene terephthalate (PET) polymer material covering its surface. The following is a detailed analysis of its corrosion resistance from the perspectives of principle and application scenarios:

1. Corrosion Resistance Principle

Chemical Stability: The ester groups and benzene rings in the PET molecular structure possess high stability, resisting the erosion of most acids, alkalis, salts, and organic solvents. For example:

Acidic Environments: It does not react with weak acids such as dilute sulfuric acid and acetic acid, and maintains its performance in acidic solutions with a pH of 3-5.

Alkaline Environments: It tolerates sodium hydroxide solutions below 5%, making it suitable for alkaline cleaning environments such as livestock farms.

Salt Spray Environments: In seawater or high-salt-spray areas, the PET coating can block chloride ion penetration, preventing the iron wire from rusting.

Physical Barrier Function: The PET coating forms a dense, continuous protective layer, completely encapsulating the iron wire surface, isolating water, oxygen, and corrosive media from contact with the metal substrate, inhibiting electrochemical corrosion reactions at the source.

UV resistance: The benzene ring structure in the PET molecular chain can absorb ultraviolet light and convert it into heat energy, preventing the coating from cracking due to photo-oxidative degradation, thus maintaining long-term corrosion resistance.

2. Corrosion Resistance in Typical Application Scenarios

Livestock and Poultry Farms

Manure Corrosion: Ammonia, hydrogen sulfide, and other gases in animal excrement combine with moisture to form a corrosive solution. The PET coating can withstand this environment, preventing the wire from rusting and breaking.

Cleaning Agent Corrosion: Farms often use chlorine-containing or alkaline cleaning agents for disinfection. The PET coating is resistant to these chemicals, reducing the frequency of fence replacement.

Aquaculture

Seawater Corrosion: PET coated wire used as the frame of wire mesh cages can be immersed in salt water for extended periods without rusting, with a service life of 8-10 years.

Resistance to Biofouling: The smooth surface of the PET coating reduces the adhesion of algae, shellfish, and other organisms, lowering the risk of structural damage due to biofouling.

Humid Environments

High Humidity Warehouses: When used for bundling goods, the PET coating prevents the wire from rusting in humid air, avoiding contamination of goods.

Underground Installation: In some scenarios where wire needs to be buried underground, the PET coating resists corrosion from soil moisture and microorganisms.

Qingdao Chenan Machinery Co., Ltd. has the advantage of developing and producing rubber winding equipment, with higher technology than various equipment assembly manufacturers in the industry. For more information about nylon coated wire, please contact us.

Company: Qingdao Chenan Machinery Co., Ltd.

Address: Yanjialing Industrial Park, East Chengma Road, Tongji New Economic Zone, Jimo District, Qingdao City, Shandong Province

Email: qdcajx@gmail.com