How to choose coatings for anti-corrosion coatings on equipment and similar items?
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How to choose coatings for anti-corrosion coatings on equipment and similar items? There are many types of protective coatings, each with different properties; the objects to be protected vary, and the usage conditions differ as well. We know that there is no \"universal paint\" suitable for all purposes. Therefore, it is very important to choose the paint. An excellent anti-corrosion coating must possess the following characteristics: (1) Good corrosion resistance: The corrosion resistance of a coating refers to the ability of its cured layer to remain stable, both physically and chemically, in the presence of corrosive agents such as water, acids, alkalis, salts, various chemicals, waste liquids, and industrial gases. In other words, it does not get swollen or dissolved by these corrosive agents, nor is it damaged or decomposed by them, and it does not undergo any harmful chemical reactions with them. ⑵Air permeability and water permeability should be low: Coatings generally have a certain degree of air and water permeability; therefore, it is necessary to use film-forming materials with low air permeability and coatings that provide strong shielding effects. ⑶It must have good adhesion and sufficient mechanical strength: Whether the coating can adhere firmly to the metal substrate is one of the key factors determining its ability to provide corrosion protection ； In addition, the cured coating should also possess certain physical and mechanical strength to withstand the stresses under operating conditions. ⑷The cost of coatings and painting is reasonable: it represents the protective material that offers the best overall benefits for the corrosion protection of equipment.
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I’m currently working on a project where the client requires the use of ceramic-metal paint for internal anti-corrosion purposes. I was wondering if anyone has used this type of paint before, and if you are aware of its advantages and disadvantages
Basically, this special type of paint is expensive! But there are advantages to its high cost – for example, when applied to the surface of rotating blades, the smoothness of its material results in relatively low resistance during rotation, so wear is minimal. It’s common for the operating current to decrease by a few percent. In the case of equipment such as heat exchangers, it can effectively reduce wear, erosion, and other issues related to fluid flow. These are the advantages and disadvantages I’ve observed. As an additional note, it’s recommended to conduct regular inspections; if cracks or peeling occur on the surface, it may lead to problems with the equipment’s dynamic balance during operation...