How to paint the corroded and rusted steel structure of the roof truss? The workshop of steel structure mainly refers to the main load-bearing components composed of steel, including steel columns, steel beams, steel structure foundations, steel roof trusses, steel roofs, etc. The corrosion and rust of metals in the atmosphere are mostly caused by the use of water vapor and oxygen. Metals are corroded in the atmosphere, and water and oxygen are the main factors. However, the corrosion of metals in the atmosphere is often caused by acid-base corrosion. For example, the Zhisheng Weihua anti-corrosion coating engineer gave an example of metal sulfur corrosion, where SO2 dissolves in water and turns into sulfite H2SO3. If SO2 is oxidized and generates sulfur trioxide (SO3), its hygroscopicity is stronger, and the corrosiveness of the aqueous solution is stronger, especially under the pollution of chemical plants such as hydrogen sulfide (H2S), ammonia (NH3), and hydrochloric acid (HC1), Both will accelerate the electrochemical corrosion of metals.

There are other reasons why metals corrode and rust in the atmosphere. Pollutants in the air, such as carbon and carbides such as soot and coal ash, metal oxides, sand, sodium chloride, sulfuric acid, and other salt particles, especially when combined with water vapor, easily penetrate the water film and passivation film on the metal surface, expel and replace oxygen ions in the passivation layer, becoming soluble chlorides, causing and accelerating the anodic dissolution and corrosion of metals. This is the metal corrosion mechanism measured at the Zhisheng Weihua Anticorrosive Coatings Laboratory, which includes 2SO2+O2 → 2SO3, SO3+H2O → H2SO4, H2SO4+Fe → FeSO4+H2, 4FeSO4+O2+2H2SO4 → 2Fe2 (SO4) 3+2H2O, Fe2 (SO4) 3+6H2O → 3H2SO4+2Fe (OH) 3.

Based on the analysis of the metal corrosion mechanism in the steel frame structure workshop mentioned above, Guang'an Zhuyuan Steel Structure Co., Ltd. has developed and produced a special anti-corrosion coating for steel frame structures, which can protect the steel frame structure from rust and corrosion for a long time. Zhisheng Weihua has long analyzed the metal corrosion mechanism of steel frame structures and found that some workshop steel frame structures have strong acid corrosion, some are atmospheric corrosion, some are weak acid corrosion, some are oxygen containing acid corrosion, and some are hydrogen containing acid corrosion. Moreover, with the increase of temperature and content, when does the degree of corrosion of steel frame structures increase and become stronger. Zhisheng Weihua's professional anti-corrosion coating researchers have tracked and summarized on site for a long time, and found that corrosion of workshop steel structures refers to the physical and chemical interactions between metals and the environment caused by corrosive gases, moisture, or pure media in the workshop. At the same time, Weihua's anti-corrosion coating engineers have mentioned the phenomenon of oxidative corrosion caused by the oxidation of steel materials with oxygen and water molecules in the air, This weakens the bearing capacity and service life of steel structural components, causing changes in metal properties, leading to damage to the metal, environment, and their constituent systems, and ultimately causing harmful effects on the production of workshop steel frame structures.

Corrosion of steel structures is a chemical change that can be divided into two types: wet corrosion and dry corrosion. Wet corrosion refers to the corrosion of metals in the presence of water, while dry corrosion refers to the corrosion in dry gas without liquid water. Zhisheng Weihua anti-corrosion coating engineer pointed out that steel structure corrosion refers to the physical and chemical interactions between metals and the environment due to corrosive gases, moisture, or pure media in the workshop, as well as the oxidation of steel materials with oxygen and water molecules in the air, resulting in oxidation corrosion phenomenon. This weakens the bearing capacity and service life of steel structure components, causes changes in metal properties, and leads to metal The phenomenon of damage to the environment and its constituent systems, resulting in harmful effects on production.

In response to the practical application conditions of metal steel frame structures, Guang'an Zhuyuan Steel Structure Co., Ltd. has developed a white ZS heavy-duty anti-corrosion coating and ZS-223 thermal reflection insulation anti-corrosion coating for over 20 years. The coating is a single component, which can be evenly stirred after opening the barrel for construction. When applied on the surface of the substrate, it has good reflection insulation and waterproof and anti-corrosion properties, preventing substrate corrosion and rust, water absorption and dissolution, and sealing protection, ZS-223 thermal reflection insulation anti-corrosion coating has excellent sun protection, heat insulation, cooling, waterproof and anti-corrosion properties, oil resistance, intermediate resistance, weather resistance, non yellowing, non powdering, smooth self-cleaning, convenient construction, and high cost-effectiveness as a functional coating. ZS-223 thermal reflection insulation and anti-corrosion coating has a dense coating, strong UV aging resistance, good corrosion resistance to acid and alkali media, salt mist, and seawater, chemical and physical adhesion to the substrate, high adhesion, long-term protection of steel frame structure from corrosion, strong white decoration, and good solar heat reflection and insulation effect, ensuring that the metal steel frame structure does not transfer heat and reducing high temperature heat, ZS-223 thermal reflective insulation anti-corrosion coating is a multifunctional anti-corrosion coating.

There is also the ZS-711 nano inorganic high-efficiency anti-corrosion coating for structural metals produced by Guang'an Zhuyuan Steel Structure Co., Ltd. It is a comprehensive and high-performance anti-corrosion coating made by unique processes such as special nanomaterials, metal special activators, complexing agents, newly synthesized polymer film-forming agents, and special cross-linking agents. ZS-711 inorganic anti-corrosion coating also has the ability to resist various acids, alkalis, salts, hydrogen sulfide, humid atmospheres The high corrosion resistance of various corrosive media such as salt spray is an ideal material for long-term corrosion protection of steel components used in harsh environmental conditions, which is a metal anti-corrosion coating that has not been found in China and simultaneously meets the performance indicators of this coating. A high-performance anti-corrosion coating can prevent corrosion of workshop steel frame structures for 20 years.