Epoxy zinc-rich primer provides strong protection for steel structures
Publish Time: 2025-04-14
In today's construction projects and infrastructure construction, steel structures have been widely used due to their high strength, light weight and good plasticity. However, steel structures will inevitably face the challenge of corrosion during long-term use. In order to effectively resist corrosion and extend the service life of steel structures, epoxy zinc-rich primer came into being and became the core component of the anti-corrosion coating system for steel structures.
Composition and characteristics of epoxy zinc-rich primer
Epoxy zinc-rich primer is a special coating composed of epoxy resin and zinc powder as the main raw materials, supplemented by thickeners, fillers, additives, solvents, etc. Its core ingredient, zinc powder, gives epoxy zinc-rich primer a unique electrochemical protection effect. Zinc powder acts as a sacrificial anode in the coating. When the coating is corroded by corrosive media, zinc powder will preferentially react with oxygen, moisture, etc., thereby protecting the substrate steel from corrosion.
In addition, epoxy zinc-rich primer also has the characteristics of strong adhesion, fast drying, and strong corrosion resistance. It can adhere tightly to the surface of steel that has been sandblasted or shot blasted to form a dense and strong coating. This coating can not only effectively block the invasion of corrosive media, but also continue to provide lasting protection through a self-repairing mechanism when the coating is damaged.
Application of epoxy zinc-rich primer in steel structure protection
Epoxy zinc-rich primer is widely used in various steel structure projects, such as bridges, building steel structures, petrochemical equipment, storage tanks, containers, etc. In these fields, steel structures often face harsh corrosive environments, such as marine climates and chemical corrosive media. Epoxy zinc-rich primer provides reliable protection for steel structures with its excellent anti-corrosion properties.
Taking marine engineering as an example, steel structure facilities such as offshore platforms and ships are exposed to seawater and marine atmosphere for a long time and are extremely susceptible to corrosion. The use of epoxy zinc-rich primer for coating can effectively resist the erosion of corrosive media such as chloride ions and sulfates in seawater, and extend the service life of steel structures. At the same time, the cathodic protection of epoxy zinc-rich primer can continue to work when the coating is damaged, providing lasting protection for steel structures.
Construction points of epoxy zinc-rich primer
In order to ensure that epoxy zinc-rich primer can give full play to its anti-corrosion performance, every link in the construction process is crucial. First, the surface of the steel must be strictly sandblasted or shot blasted to meet the specified cleanliness and roughness standards. Secondly, the preparation and coating of epoxy zinc-rich primer must be carried out in accordance with the prescribed proportions and methods to ensure the uniformity and density of the coating. In addition, environmental factors such as temperature and humidity during the construction process also need to be strictly controlled to avoid adverse effects on the quality of the coating.
Future development of epoxy zinc-rich primer
With the continuous enhancement of environmental awareness and the continuous advancement of coating technology, epoxy zinc-rich primer is also constantly developing and innovating. Water-based epoxy zinc-rich primer, as an environmentally friendly high-performance coating, has gradually emerged in the market. It uses water as a diluent, has an extremely low content of organic solvents, is non-polluting to the environment, and is harmless to human health. At the same time, water-based epoxy zinc-rich primer also maintains the excellent anti-corrosion properties of traditional epoxy zinc-rich primer, providing more environmentally friendly and reliable protection for steel structures.
