With the acceleration of industrialization and urbanization, construction projects are increasingly demanding on the durability and safety of materials, especially those used in corrosion-prone environments. As a result, anti-corrosion materials have emerged, which not only protect buildings and equipment from corrosion, but also greatly extend the service life of engineering projects and reduce maintenance costs. The following is a detailed analysis of several common anticorrosive materials and their application fields.
1.Anticorrosive coatings: the first choice for improving surface durability.
Anticorrosive coating is the most widely used type of anticorrosive material, which isolates the direct contact between metal and corrosive media (such as water, oxygen, chemicals, etc.) by forming a protective layer on the metal surface, so as to achieve the purpose of anti-corrosion. Anticorrosive coatings can be divided into the following categories according to their composition and mechanism of action:
Epoxy resin coatings: excellent adhesion and chemical stability, suitable for harsh environments such as offshore platforms, pipelines, chemical equipment, etc.
Silicone modified coatings: with excellent ultraviolet light resistance and temperature change resistance, suitable for metal structures and outdoor structure surface protection with large temperature changes;
Polyurethane coating: It has good elasticity and wear resistance, and is often used in bridges, automobile chassis and other occasions subject to physical impact.
Anti-rust paint: rich in anti-rust pigments such as zinc, chrome yellow, iron phosphate, etc., suitable for the surface protection of steel structures.
Fluorine-containing coatings: with excellent weather resistance and self-cleaning, suitable for high-rise building exterior walls, signage, etc.
Acrylic anticorrosive coatings: The material is a water-soluble environmentally friendly coating, which can be used for structural anti-corrosion in underground humid environments and groundwater treatment and environmental conditions with high water quality requirements;
2.Anti-corrosion alloys: excellent mechanical properties and corrosion resistance coexist.
Anti-corrosion alloys improve their corrosion resistance by adding a certain proportion of other elements (such as chromium, nickel, molybdenum, etc.) to the metal material. Common anti-corrosion alloys are:
Stainless steel: chromium content higher than 105%, widely used in construction, medical, food processing and other fields.
Hastelloy: Excellent resistance to high temperatures and chemicals, commonly used in the chemical, aerospace and energy industries.
Titanium alloy: high strength, low density, corrosion resistance, suitable for aerospace, chemical and marine engineering.
3.Anti-corrosive plastics: lightweight, corrosion-resistant, and easy to process.
Anticorrosive plastics have the characteristics of lightweight, corrosion-resistant and easy to form, and the commonly used anticorrosive plastics are:
Polyethylene (PE): It has good chemical stability and is suitable for making chemical storage tanks, pipelines, etc.
Polypropylene (PP): High heat and chemical resistance, suitable for the production of containers and pipes for corrosive media.
Fluoroplastics: such as polytetrafluoroethylene (PTFE), in addition to strong acids and alkalis, almost all chemical media are resistant, and are used in the chemical and electronic industries.
4.Anti-corrosive rubber: good elasticity and strong sealing.
Rubber has natural waterproof and mildew resistance, and can be made into anticorrosive rubber by adding special additives and fillers
Neoprene: Excellent oil and chemical resistance, used as a sealing material.
EPDM: Good heat resistance, weather resistance, ozone resistance, suitable for airtight and watertight materials for automobiles and buildings.
Fields of application. Anticorrosive materials are widely used in petrochemical, marine engineering, urban infrastructure, rail transit, aerospace and other fields. Reasonable selection and application of anti-corrosion materials can not only ensure the quality and safety of engineering projects, but also effectively extend their service life and reduce maintenance costs.
In modern industry and infrastructure construction, higher requirements are put forward for the corrosion resistance of materials. With the in-depth research on the anti-corrosion mechanism and the continuous progress of material science and technology, the future of anti-corrosion materials will be more environmentally friendly, more economical and more efficient.
Epilogue. In such a complex and changeable environment, the application and research of various types of anti-corrosion materials are particularly crucial. Our understanding and application of them is not only a progress in science and technology, but also a protection and extension of our precious resources. Hopefully, this article will provide you with some help and guidance in the selection and application of anticorrosive materials.