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    Similarities and differences between epoxy zinc rich primer and cold galvanized paint

    发布时间:2019-04-15 浏览:112249次 字号:  

    Epoxy zinc rich primer and cold galvanized paint belong to high zinc rich primer with excellent electrochemical anti-corrosion performance. The paint film is tough and wear-resistant, strong adhesion, good mechanical properties and excellent anti-corrosion performance. It has triple anti rust capabilities of shielding, corrosion inhibition and cathodic protection. It is the first anti-corrosion primer for outdoor steel structures. At the same time, the requirements for treating the substrate surface are the same. For different places, we can distinguish them from their composition, zinc content, anti rust effect, cost, application scope and so on.


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    1、 Composition: epoxy zinc rich primer is a special coating composed of epoxy resin, zinc powder and ethyl silicate as main raw materials, thickener, filler, additives and solvents. The cold galvanizing paint is usually composed of graphene conductive resin, ultra-fine zinc powder with special surface treatment, special resin, environmental protection solvent and additives.


    2、 Zinc content: the dry film zinc powder content of epoxy zinc rich primer is usually about 70%, up to 80%, while the dry film zinc powder content of cold galvanized paint is as high as 96%.


    3、 Cost: epoxy zinc rich primer is a high solid content coating, dry film 80 μ M film thickness, one kilogram can be sprayed with 3-4 square meters. The cost of paint materials per square meter is about 10 yuan. The solid content of cold galvanized coating is low, and the dry film is 80 μ M of paint film thickness, two airless spraying are required. One kilogram can be sprayed with about 2 square meters, and the cost of paint materials per square meter is about 20 yuan.


    4、 Function and application scope: epoxy zinc rich primer has excellent anti-corrosion performance, strong adhesion, high content of zinc powder in paint film, cathodic protection and excellent water resistance. Epoxy zinc rich primer is used as the supporting primer of heavy anti-corrosion coating. It is suitable for the primer of storage tanks, containers, steel structures, steel pipes, offshore platforms, ships, seaport facilities and harsh anti-corrosion environment. Cold galvanized paint has excellent adhesion, impact resistance and flexibility, excellent weather resistance, color retention and light retention, super aging resistance and corrosion resistance, excellent water resistance, salt resistance and chemical corrosion resistance. Cold galvanized paint is mainly used to protect and repair the processed galvanized sheet, structural steel, steel roof, doors and windows, ship equipment seriously corroded by seawater, public equipment, various facilities in metallurgical plants, water treatment plants and paper mills.


    In conclusion, if the performance of cold galvanized paint is better than that of epoxy zinc rich primer in terms of anti-corrosion performance. In terms of price and cost, epoxy zinc rich primer is a little cheaper than cold galvanized paint. In terms of construction, the construction of epoxy zinc rich primer is simpler than that of cold galvanized paint. Therefore, epoxy zinc rich primer and cold galvanized paint have their own advantages and are ideal coatings with excellent anti-corrosion performance.