In fields such as oil transportation, municipal water supply, and chemical production, steel pipes are exposed to water, acidic and alkaline media, and soil impurities for extended periods, making them susceptible to corrosion. This can lead to leaks, shortened pipeline lifespans, and even accidents. Anti-corrosion steel pipes, by applying an anti-corrosion coating to the surface or interior of ordinary steel pipes, prevent contact between corrosive media and the steel. This makes them a key material for ensuring the stable operation of pipeline systems and is widely used in industrial and infrastructure construction.

Currently, there are three main types of mainstream anti-corrosion technologies. First, coating is used for corrosion protection. This involves spraying epoxy resin, polyethylene, or other polymer materials onto the surface of steel pipes to form a dense protective film. Examples include 3PE (three-layer polyethylene coating) corrosion-resistant steel pipes, which offer strong weather and impact resistance and are suitable for buried oil and gas pipelines. Second, coating is used for corrosion protection. This involves hot-dip galvanizing and chromium plating to create an alloy layer between the metal coating and the steel. Examples include hot-dip galvanized steel pipes, which are cost-effective and easy to install and are commonly used in municipal guardrails and low-pressure water supply pipes. Third, lining is used to coat the inner wall of steel pipes with corrosion-resistant materials such as polytetrafluoroethylene (PTFE) and ceramics. This is suitable for chemical pipelines transporting strong acids and alkalis. For example, PTFE-lined steel pipes can withstand temperatures ranging from -200°C to 260°C.

Compared to ordinary steel pipes, the core advantages of corrosion-resistant steel pipes lie in their extended lifespan and reduced costs. Ordinary steel pipes have a lifespan of only 2-5 years in soil or corrosive media, while high-quality corrosion-resistant steel pipes can last up to 15-30 years, reducing the frequency of pipe replacement. Furthermore, corrosion protection eliminates the need for repairs due to corrosion-related leaks, reducing operational costs. In practical applications, they serve as the "safeguard" of oilfield pipelines, protecting them from corrosion caused by sulfides in crude oil; they serve as the "guardian" of urban water supply networks, preventing water pollution caused by pipeline corrosion; and they serve as the "lifeline" of chemical industrial parks, ensuring the safe transportation of acidic and alkaline media.

With technological advancements, corrosion-resistant steel pipes are being upgraded towards environmental friendliness and high performance. For example, the use of water-based anti-corrosion coatings reduces pollution, while nano-composite coatings enhance corrosion protection. In the future, they will better adapt to complex operating conditions and provide a stronger guarantee for the long-term operation of infrastructure.