The main corrosion prevention measures for petrochemical equipment involve improving the structural design of such equipment to enhance its resistance to corrosion
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The corrosion of metals always begins at the surface, and the purpose of structural design is to keep the surface in the best condition, so as to ensure its functional performance while facilitating corrosion control. A reasonable structural design encompasses two fundamental aspects. First, it involves minimizing or eliminating irregularities in the product and its surrounding environment, so as to prevent the formation of corrosion sites or to make such formation extremely difficult, all while ensuring that the equipment meets its required performance standards. Second, the designer must consider what protective measures should be employed and create the conditions necessary for their implementation, in order to achieve effective corrosion prevention. General principles for the design of corrosion-resistant structures: (1) Provide a corrosion margin to prevent equipment failure caused by 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 the 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.
To prevent corrosion in petrochemical equipment, it is essential to start with structural design. In simple terms, it involves making the surface of the equipment as smooth and even as possible to reduce the chances of corrosion, while also facilitating subsequent maintenance. Specifically, the following points should be taken into account during design: 1. Leave some margin for corrosion to prevent the equipment from becoming unusable prematurely due to uniform corrosion. 2. The design should be as simple as possible, with a smooth surface to avoid stress concentration. 3. Prevent corrosive liquids or deposits from accumulating in the equipment. 4. Reduce connection gaps to prevent gap corrosion. 5. Use the same material or materials with similar potentials as much as possible to avoid electrochemical corrosion. 6. Structurally, consideration should be given to reducing corrosion caused by liquid scouring. In simple terms, it means minimizing dead zones on the device’s surface and reducing exposure to damage, laying a solid foundation for corrosion resistance from the design stage onward. .
There is a typo – reserve a corrosion margin of two to prevent equipment failure due to uniform corrosion；