Equipment corrosion protection: Trends by 2026 – High temperature, high pressure, and CUI insulation corrosion become the main areas of concern​

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Trends in equipment corrosion prevention for 2026: High temperature and pressure, as well as CUI-induced thermal insulation corrosion, are becoming major issues. Equipment tends to lose its paint when exposed to such conditions; once the insulation layer is removed, rust becomes visible everywhere. CUI can also lead to hidden pipe ruptures and unexpected downtime. Companies often encounter pitfalls during quoting, equipment selection, and construction processes, resulting in doubled rework costs. Today, I’ll give you direct guidance on avoiding pitfalls in selection plus implementation plans; by reading this, you can devise the right plan accurately, reduce rework, increase profits, and ensure successful approval. I. Three key challenges in 2026: all related to money and safety issues. 1. High-temperature conditions: Coatings fail as soon as they are exposed to heat. Ordinary anti-corrosion coatings cannot withstand temperatures above 150°C; they peel, flake off, and lose their protective function entirely. 2. High-pressure conditions: Medium penetration, combined with stress cracking and pressure fluctuations, causes the coating to be torn apart; the corrosive medium penetrates rapidly, leading to a rapid thinning of the equipment’s wall thickness. 3. CUI under insulation corrosion: The number one invisible killer in the industry. It’s undetectable and unidentifiable; it only becomes apparent after pipe rupture occurs. It is most common in [petrochemical plants, power plants, and thermal pipelines], and incurs the highest maintenance costs. II. Why will these three types of equipment become the main battlegrounds in 2026? 1. Equipment upgrades: Operating conditions are becoming more extreme. Equipment is evolving toward higher temperatures and pressures, longer operating cycles, and continuous operation; as a result, conventional anti-corrosion systems are no longer suitable. 2. Change in operations and maintenance logic: Shifting from emergency repairs to prevention. Property owners no longer accept “cheap primer”; they only recognize 【corrosion resistance throughout the entire lifecycle】, thereby driving technological upgrades. 3. CUI is under strict supervision; safety inspection and maintenance standards have been tightened, with \"corrosion under insulation\" now listed as a key hazard. III. Root cause analysis: How do these 3 types of corrosion occur? 1. Causes of high-temperature corrosion: ① Rising temperature leads to degradation of the coating resin; ② Adhesion drops sharply, causing the protective barrier to fail; ③ Oxidation/sulfidation rates increase exponentially. 2. Causes of high-pressure corrosion: ① Pressure differences drive the medium to penetrate the coating; ② Vibration and stress from the equipment accelerate coating delamination; ③ Risks of crevice corrosion and hydrogen-induced cracking increase significantly. 3. Causes of CUI insulation corrosion (the most fatal): ① Water vapor enters the insulation layer and cannot escape; ② Alternating hot and cold temperatures create pools of condensation; ③ Chloride ions concentrate, leading to rapid pitting and stress cracking. This results in 【hiddenness + suddenness】, directly causing unplanned shutdowns. IV. 2026 Implementation Solutions: Directly usable by sales representatives, purchasers, and construction workers. 1. High-temperature corrosion protection: Choosing the right system ensures a one-time successful solution. ① Below 250°C: Phenolic epoxy/modified epoxy – heat-resistant, water-resistant, and resistant to various media; the most cost-effective choice. ② 250–550℃: Silicones are resistant to high temperatures and maintain thermal stability, making them suitable for use in equipment exposed to high temperatures over extended periods. ③ Above 550°C: Inorganic zinc-rich/ceramic coatings are resistant to high-temperature oxidation; suitable for furnace bodies and flue ducts. [Warning] Do not use room-temperature epoxy as a high-temperature paint; it will peel off at temperatures above 120°C, resulting in losses from rework. 2. High-pressure corrosion protection: A three-layer defense mechanism ① Primer: High adhesion and resistance to penetration (such as epoxy zinc-rich primers); ② Intermediate coat: Provides an additional barrier with shear resistance; ③ Topcoat: Resistant to temperature, chemicals, and stress. [Key requirement] Adhesion tests using the pull-off method must be conducted on high-pressure sections, and any value below 5 MPa indicates failure. 3. CUI insulation and corrosion protection: The standard approach for 2026 (must be saved) ① Use a CUI-specific coating system capable of withstanding temperatures in the range of 30–120°C, as well as offering resistance to condensation and chloride ions. ② For insulation materials, choose closed-cell, water-repellent types that absorb little water and retain little liquid, thereby reducing water usage at the source. ③ An outer coating is used for sealing and waterproofing to prevent rainwater/condensate from entering the interlayer. ④ Infrared thermal imaging for monitoring / Online sensors that do not require removal of insulation to locate corrosion areas in advance. 【Industry Standards】Comply with NACE SP0198, which is a requirement that owners must adhere to by 2026. V. Real-world cases and data: Let the results speak. Case 1: Petrochemical high-temperature and high-pressure pipelines. Original solution: Conventional epoxy, peeling after 6 months. New solution: CUI-specific phenolic epoxy + high-pressure support. Results: After 30 months of continuous operation, the coating remained intact, and the corrosion rate decreased from 0.3 mm/a to below 0.05 mm/a. Case 2: CUI treatment for steam pipes in a power plant. Original problem: Insulation had to be removed for repairs every year, at a cost of over 200,000 yuan. New solution: Hydrophobic insulation + CUI-specific coating + sealed wrapping. Result: The inspection and maintenance cycle was extended from 1 year to 4 years, resulting in a 65% reduction in overall costs. Data: According to industry statistics for 2025, [unplanned downtime caused by CUI] accounts for over 40% of pipeline incidents. In 2026, the coverage rate of targeted remediation efforts is expected to rise to 75%. VI. Action Plan for 2026: Follow these steps exactly. ① Sales staff: Focus on promoting integrated solutions for high temperature/high pressure/CUI applications; avoid discussing unit prices and instead focus on the total life-cycle cost. ② Purchasing: Give priority to products with CUI certification, temperature resistance reports, and high-voltage test results; reject low-priced non-standard goods. ③ Construction: Strictly control surface treatment, film thickness, and adhesion; the coating must be inspected prior to insulation. ④ Engineer: List the CUI critical area separately, and implement waterproofing and monitoring during the design phase. VII. Conclusion: In 2026, equipment corrosion prevention will no longer be merely “applying a coat of paint”; high temperature, high pressure, and CUI (corrosion under insulation) are the real main battlefields. Whoever masters this logic for selection and construction first will be able to win high-end projects, minimize rework, and ensure stable profits. Remember one thing: conventional solutions are not suitable for extreme operating conditions; systematic measures are needed to prevent hidden corrosion. For corrosion protection in 2026, relying on expertise ensures no losses.