[Haichuan Anti-Corrosion Knowledge] Understand everything in one article: Technical advantages of anti-corrosion coatings with low surface treatment

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One article to understand: The technical advantages of low-surface-treatment anti-corrosion coatings. In traditional anti-corrosion methods, the substrate must be subjected to high-intensity sandblasting for rust removal, which results in high labor costs and thus raises the price of anti-corrosion treatments. Old steel structures, as well as those operating under complex conditions, cannot achieve high standards of surface treatment; the adhesion of coatings is poor, leading to frequent rework and failure to pass inspections. Failing to understand the advantages of low-surface-treatment anti-corrosion coatings and choosing ordinary anti-corrosion coatings blindly not only results in extra labor and materials costs but also shortens the protective lifespan. I. Core Advantage 1: Low requirements for surface treatment, saving labor and costs while being suitable for complex operating conditions. Conclusion: Coatings with low surface treatment requirements need no high-intensity sandblasting; application is possible with St2-level treatment, thereby significantly reducing construction costs. The real logic of the industry: Traditional anti-corrosion coatings require Sa2.5 level sandblasting, while coatings with reduced surface treatment optimize the resin formula to suit substrates that have only undergone mild treatment. Data shows that the use of such coatings can reduce surface treatment costs by 30%-50%, saving over 10,000 yuan per storage tank in terms of construction costs. It is particularly suitable for old steel structures and complex storage tanks, addressing the challenges of implementing high-standard treatment and the risk of damaging the substrate. Practical method: 1. Before construction, remove loose rust layers, welding slag, and visible oil stains; thorough sandblasting is not necessary – achieving St2 level is sufficient. 2. Renovation of old steel structures requires no extensive grinding; painting can be carried out directly after partial cleaning, saving labor costs. 3. In line with construction standards, adjust the cleaning intensity based on the degree of substrate corrosion, and avoid arbitrarily raising the treatment standards. II. Core advantage 2: Strong adhesion and wide applicability, reducing the risk of rework. Conclusion: These low-surface-treatment anti-corrosion coatings exhibit strong compatibility with wet or rusted substrates, and their adhesion is 3 times higher than that of ordinary anti-corrosion coatings. The true logic of this industry: By adding special adhesion promoters, it is possible to achieve both chemical bonding and mechanical anchoring. Third-party testing showed that its scratch adhesion rating is grade 0, and its adhesion to wet surfaces reaches 8 MPa, making it resistant to peeling and detachment. It can be applied directly to slightly moist substrates with a thin layer of rust, addressing the problem of poor performance associated with traditional coatings. Practical method: 1. Slight punctate rust on the surface of the substrate is acceptable; there is no need to remove it completely, as excessive treatment may damage the substrate. 2. Suitable for construction in humid environments – no additional drying is required; painting can be carried out directly. It is appropriate for use during the rainy seasons in the south as well as in marine environments. 3. Used in combination with epoxy zinc-rich primers to further enhance adhesion and extend the corrosion resistance life of steel structures. III. Core advantage 3: High construction efficiency, short project duration, and reduced overall costs. Conclusion: Coatings with low surface treatment requirements simplify the construction process, allowing the project duration to be reduced by 30% while significantly cutting overall costs. The real logic behind this industry: by eliminating processes such as high-intensity sandblasting and drying, the efficiency of individual workers increases by over 40%. In traditional coating applications, surface treatment accounts for 60% of the total construction time, while coatings with reduced surface treatment requirements can eliminate most of these procedures. It is particularly suitable for projects with tight deadlines, helping to avoid delays and increased costs resulting from the long processing time required for surface treatment. Practical method: 1. Use airless spraying; a single coat can achieve the desired film thickness, eliminating the need for multiple applications and thus improving efficiency. 2. Construction workers do not require professional sandblasting skills; they can start working after simple training, thus saving labor costs. 3. Plan the construction process rationally; apply coatings immediately after surface cleaning to prevent secondary corrosion. IV. Core Advantage 4: Environmentally compliant, excellent protective performance, combining long-term effectiveness with regulatory compliance. Conclusion: Low-surface-treatment anti-corrosion coatings are mostly solvent-free and have low VOC content; they are both environmentally compliant and offer long-lasting anti-corrosion protection. The real logic of the industry: Modern low-surface-treatment coatings can have a solid content of over 98%, resulting in virtually no VOC emissions, thus complying with new environmental regulations. Its salt spray resistance can exceed 4,000 hours, which is far higher than that of conventional epoxy coatings; its protective lifespan can reach over 15 years. Construction in enclosed spaces results in no emission of harmful gases, which not only protects the health of workers but also ensures successful approval in environmental inspections. Practical implementation method: 1. In applications with high environmental protection requirements, such as municipal projects, chemical industries, and offshore platforms, solvent-free low-surface-treatment coatings should be given priority. 2. No additional ventilation or deodorization is required during construction, making it suitable for confined spaces such as sealed storage tanks and underground utility tunnels. 3. When used in conjunction with a polyurethane topcoat, it enhances weather resistance, providing dual protection of “environmental friendliness and long-term durability”. V. Key pitfalls to avoid: 3 crucial tips for leveraging advantages. Conclusion: By avoiding these 3 mistakes, it is possible to fully utilize the advantages of low-surface-treatment anti-corrosion coatings, thus avoiding unnecessary expenses and rework. The real logic of the industry: 40% of construction failures stem from mistaking “low-level treatment” for “no treatment at all,” as well as from neglecting proper foundation cleaning. Myth: Failing to clean the substrate at all, blindly adapting to extreme corrosion conditions, and not following the prescribed mixing ratios, all of which lead to the failure of the coating. Proper use can reduce overall costs by 25%, while avoiding rework and ensuring that the protective effects meet the required standards. Practical methods: 1. Do not opt for “no treatment” blindly: It is necessary to remove loose rust layers and oil stains to ensure that the substrate is solid and meets the construction standards. 2. Precise adaptation to operating conditions: In extreme corrosion environments, a specialized topcoat is used, without relying solely on a primer with low surface treatment. 3. Mix the coating strictly according to the specified ratio, and maintain a construction temperature above 0°C to ensure proper curing. Truth from an experienced engineer: Low-surface-treatment anti-corrosion coatings are not a form of \"lowering standards,\" but rather an \"efficient adaptation.\" By fully leveraging its core advantages of low treatment requirements, high adhesion, and cost savings, and by carrying out construction in accordance with relevant standards, it not only helps to overcome the challenges associated with old steel structures and complex working conditions, but also reduces the costs related to anti-corrosion measures, offering both convenience and long-term effectiveness. Save this guide to easily understand the advantages of low-surface-treatment anti-corrosion coatings, make the right selection, and carry out construction efficiently without making mistakes. If you find it useful, please like, watch, and share it in the anti-corrosion engineering group to help your peers avoid unnecessary detours and save on construction costs.