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To prevent corrosion in industrial wastewater tanks, it is necessary to implement comprehensive control throughout the entire process, from the initial design and material selection to proper construction and daily maintenance. The key is to block potential pathways for corrosion in advance and reduce the risk of erosion. The specific methods are as follows: 1. Design phase: Selecting materials suitable for corrosive conditions – Choose materials based on their corrosion resistance level: Determine the appropriate anti-corrosion measures according to the corrosivity of the wastewater (strong acids, strong bases, high salinity). In cases of severe corrosion, fiberglass lining or glass flake mortar should be used; under normal conditions, it is not acceptable to limit protection to just two layers of epoxy resin； In high-acidity environments, it is recommended to use acid-resistant bricks combined with a fiberglass insulation layer. Structural optimization to reduce corrosion dead zones: Arc-shaped transitions are used at the interior and exterior corners of the tank to prevent stress concentration that could cause cracks in the anti-corrosion coating ； Design a proper ventilation and drainage system to reduce corrosion in the areas of the tank walls where moisture conditions alternate, as well as prolonged soaking due to accumulated water. Use corrosion-resistant materials: Small sewage tanks can be manufactured entirely from fiberglass or stainless steel, thereby reducing the likelihood of corrosion at its source ； For concrete tanks, it is recommended to use sulfate-resistant cement to enhance their corrosion resistance. II. Construction phase: Strict control of technical details is necessary to ensure effective corrosion protection. Proper preparation of the substrate is essential: newly built concrete tanks must be cured for 28 days to ensure that their moisture content is below 6%. Before construction, any surface dust, alkaline substances, or loose layers must be completely removed; only after polishing to achieve the required level of roughness and cleanliness can adhesion of the anti-corrosion coating be ensured. Standardize layered construction: The fiberglass reinforcement anti-corrosion process is carried out in layers following the sequence of \"primer – applying fabric – coating resin\", to ensure that the resin penetrates thoroughly into the glass fiber fabric and to prevent the formation of bubbles or voids ； For glass flake mortar, the total thickness must be controlled (not less than 4 mm in highly corrosive environments); apply it in layers to prevent cracking during single-application application. Conduct proper acceptance testing: After completion of construction, spark testing must be carried out to ensure that there are no pinholes in the anti-corrosion coating. At the same time, the uniformity of the coating thickness and its adhesion should be checked; the system can only be put into use after it is confirmed to be free from defects such as cracks or peeling. III. Operation and maintenance phase: Regular inspections and maintenance help to slow down the progression of corrosion. Periodic specialized inspections are required: at least two comprehensive inspections per year should be carried out, with a focus on areas prone to corrosion such as those with fluctuating water levels, aeration points, and corners. It is important to check for signs such as peeling coatings, discoloration, or concrete cracking; any minor issues detected early should be repaired promptly to prevent further corrosion. Optimizing wastewater treatment processes: Pretreatment is used to reduce the concentrations of corrosive substances such as acids, bases, heavy metals, and sulfates in wastewater, thereby minimizing corrosion of treatment tanks ； Clean the sediment at the bottom of the tank in a timely manner to prevent prolonged accumulation of microorganisms from exacerbating corrosion. Regular touch-up maintenance: Generally, the anti-corrosion coating needs to be completely reapplied every 5–8 years; in highly corrosive environments such as coastal areas, this interval is reduced to 3–5 years. This helps prevent the spread of localized corrosion from damaging the entire tank structure.