General design principles for equipment corrosion protection
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Current anti-corrosion technologies mainly include: the development of corrosion-resistant materials, surface anti-corrosion techniques, corrosion inhibition techniques, and electrochemical protection.
From a design perspective, it is necessary to select metals with appropriate properties. The general principles for designing structures that resist corrosion are as follows: (1) Provide a margin against corrosion to prevent equipment failure due to uniform corrosion； (2) The external structure should be simple, with a smooth and uniform outer surface, to avoid stress concentration in the load-bearing parts ； (3) Prevent retention of corrosive media and corrosion caused by deposits ； (4) The structural design should minimize gaps between connections to prevent crevice corrosion. (5) To avoid galvanic corrosion, the same material or materials with similar properties should be used as much as possible for components of the same structure. (6) Structural design to prevent erosion corrosion.
This post was last edited by Wang Wei2 on 2019-7-4 10:40. It’s a great topic for discussion; I hope everyone will share their thoughts. Because design is the first and most important stage in the equipment manufacturing process. The so-called corrosion prevention design includes the selection of corrosion-resistant materials (materials for main equipment, components, and coatings), taking into account corrosion control requirements in the structural design and strength verification of the equipment, providing the necessary conditions for implementing the protection techniques to be used (such as coatings) during the design process, and offering guiding suggestions regarding manufacturing techniques.
To be honest, some young equipment designers are unaware of the application environment in which the equipment will be used, and they mechanically set the parameters based on the conditions provided by the manufacturing process, paying little attention to the corrosive factors present in the operating environment.
The designer thinks they understand it, the manufacturer thinks the designer understands it as well, and the client thinks you have taken everything into account – and that’s the result. . . .
When it comes to equipment corrosion protection, metal materials come to mind naturally. And often, many devices are not made of metal. I chose metal, but it still can’t provide protection.