The comprehensive selection of the best anti-corrosion solution requires consideration of the environment, corrosive media and cost. Steel structure anti-corrosion is a key link in ensuring the long-term stable operation of steel structures. Common anti-corrosion methods include coating protection, thermal spraying protection, cathodic protection, corrosion inhibitor protection and alloying protection. Each method has its own unique advantages and applicable scenarios. In this issue, we will introduce several common methods of steel structure anti-corrosion.
1. Coating protection method
The coating protection method is the most commonly used method for steel structure corrosion protection. By applying a layer of anti-corrosion coating on the surface of the steel structure, it can effectively isolate the external corrosive medium from contact with the steel structure itself, thereby playing an anti-corrosion role. This method is simple and easy, low-cost, and widely used in various steel structure projects. However, the coating protection method requires regular maintenance and re-coating to ensure a long-lasting anti-corrosion effect.
2. Corrosion inhibitor protection method
Corrosion inhibitor protection is a method of reducing the corrosion rate by adding corrosion inhibitors to the corrosive medium. The corrosion inhibitor can react chemically with the corrosive components in the corrosive medium to form a protective film, thereby playing an anti-corrosion role. This method is simple to operate, low cost, and suitable for some specific corrosive environments. However, the effect of the corrosion inhibitor protection method is affected by environmental conditions and the type of corrosion inhibitor and needs to be selected and adjusted according to actual conditions.
3. Alloying protection method
The alloying protection method is a method of improving the corrosion resistance of steel structure materials by changing their composition. By adding some elements with anti-corrosion properties to steel, such as chromium, nickel, etc., the corrosion resistance of steel can be improved. This method is suitable for steel structures that operate in harsh environments for a long time, but it is expensive and requires special smelting and processing technology.
Fourth, Cathodic Protection Method [Cathode Protection]
Adding a more active metal to the surface of the steel structure to replace the corrosion of the steel, the principle is to apply an external current to the surface of the corroded metal structure, and the protected structure becomes the cathode, so that the electron migration of the metal corrosion is suppressed, avoiding or weakening the occurrence of corrosion. Usually used for underwater or underground structures.
Five, Thermal Spraying Protection [Thermal Spraying]
Thermal spraying technology is an engineering method for generating protective or functional coatings on the surface of various materials. When used, the coating material is heated and sprayed onto the surface of the substrate to form a uniform and firm coating. Different coating materials are selected according to different needs to obtain better wear resistance, corrosion resistance, oxidation resistance, and high heat resistance.
In addition to the above-mentioned anti-corrosion schemes, there are other anti-corrosion methods, such as the use of anti-corrosion agents, anti-rust primers, etc. Anti-rust primer is a primer specifically used for anti-corrosion of steel structures, which can provide good adhesion and ensure the firmness of the subsequent coating layer. Anti-corrosion agents are added to the coating to improve the anti-corrosion performance of the coating and extend the service life of the steel structure.
Summary:
Reasonable anti-corrosion design can improve the anti-corrosion effect and reduce maintenance costs. Anti-corrosion design should fully consider the use environment, material characteristics, and other factors of the steel structure, select appropriate anti-corrosion methods, and ensure that the steel structure maintains good anti-corrosion performance in long-term use.
However, in actual projects, the most suitable anti-corrosion method should be selected based on the use environment, corrosive media, maintenance costs, and other factors of the steel structure. At the same time, to ensure a lasting anti-corrosion effect, it is also necessary to strengthen the daily maintenance and maintenance of the steel structure, timely discover and deal with corrosion problems, and ensure the safe and stable operation of the steel structure.