Corrosion Prevention Construction Process and Paint Selection for Sewage Ponds

The septic tank, having been in contact with acidic and alkaline waste liquids and experiencing microbial corrosion over a long period, necessitates strict adherence to scientific procedures for corrosion prevention. The selection of coatings is a critical phase in this process.

Construction Process

00001. Field Level ProcessingFirst, remove the laitance, oil stains, and cracks from the concrete surface. Grind it with an angle grinder until the solid base is exposed, then clean it thoroughly with a high-pressure water jet to ensure the surface is dry with a moisture content ≤8%. If there are honeycomb or rough surfaces, fill them with epoxy putty to smooth them out, which is crucial for ensuring the adhesion of the coating.

00001. Prime Coat ApplicationA base coat is evenly applied to the pre-treated substrate to enhance adhesion, typically using a roller or spatula method. The thickness is controlled to 50-80μm, and the next step can be performed after 24 hours.

Mid-Level CoatingAccording to design specifications, apply 2-3 intermediate coats of paint, each with a thickness of approximately 100μm, ensuring continuous and no missed coatings. Build a robust corrosion barrier through multiple coatings, with at least a 12-hour interval between each coat.

00001. Surface Paint ApplicationA single coat of surface paint enhances overall corrosion resistance and weatherability, with a thickness of approximately 50-80μm. The surface must be cured for more than 7 days before it can be put into use.

Paint Selection

The anti-corrosion coatings for wastewater ponds must meet requirements of resistance to acids and alkalis, anti-penetrability, and strong adhesion to concrete.Specialty Cyanogen Chlorinated Waterproofing and Corrosion-Resistant CoatingIt's the ideal choice as a two-component rigid coating, boasting compressive strength over 20MPa upon curing and capable of withstanding long-term erosion from acidic and alkaline substances in wastewater. Its molecules can penetrate deep into the concrete micropores, forming a chemical bond, and boasts excellent impermeability. A three-layer coating of 300 micrometers effectively prevents wastewater渗透. Simply mix in proportion before application, with a single coat thickness of 100μm, reducing the construction timeline by 40%. It's particularly suitable for damp and complex environments like wastewater pools, balancing protective effects with construction efficiency.