How to achieve rational use of epoxy resin

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How to use epoxy resin properly: Resin-based corrosion-resistant materials, especially epoxy resin, offer excellent comprehensive properties and outstanding corrosion resistance, with a wide range of applications and many options available. Based on the form of corrosive agents and their characteristics of corroding building structures, they can be divided into 5 major categories: gaseous agents, corrosive water, acid-base-salt solutions, solid agents, and polluted soil. These various agents can be classified according to their properties and concentrations. Furthermore, based on the degree of corrosion they cause in building materials over time, they can be categorized into four levels: high corrosion, moderate corrosion, low corrosion, and no corrosion. Appropriate corrosion-resistant materials can be selected and effective protective measures can be taken based on the corrosion characteristics of the project. The applications of epoxy resins in building corrosion protection projects include resin mortars, resin grouts, fiberglass-reinforced plastics, and resin glass flake coatings. Resin mortar, resin grout, and resin glass flake materials are prepared using resin as the bonding agent, along with curing agents, toughening agents (catalysts or diluents may be added to some of these materials), powders, fine aggregates, coarse aggregates, and treated glass flakes as fillers. Fiberglass-reinforced plastic is created by combining resin compounds with reinforcing materials such as glass fiber strands, glass fiber cloth, glass fiber surface mats, glass fiber chopped mats, or polyester cloth, polyester mats, and polypropylene cloth, polypropylene mats, etc. As a corrosion-resistant material, epoxy resin not only possesses properties such as density, water resistance, good leak prevention, and high strength, but it also features excellent workability thanks to its strong adhesion, operability at room temperature, and simple application process, all while maintaining a moderate price. Corrosion protection projects using such materials generally include: integral fiberglass surfaces and isolation layers reinforced with resin-based adhesives; block surfaces paved with resinous mortars and pastes; block surfaces with joints filled or sealed using resinous mortars; single or composite integral surfaces and isolation layers made from resinous thin mortars or pastes; and surfaces made from resin-glass flake mortars, among others. Depending on the type of material chosen, the functional capabilities and application scope of the final product in corrosion protection projects will vary significantly. Epoxy resins, which are commonly used in anti-corrosion projects, can be used not only on their own but also in combination with resins such as unsaturated polyester resins, vinyl ester resins, phenolic resins, and furan resins to form composite structures. This approach allows for the full utilization of each resin’s advantages, cost reduction, improved product quality, and easier construction. It can also be modified with other resins to form modified resins, and the modification methods include physical and chemical approaches. Epoxy coal tar is a typical product of physical modification of epoxy resins, giving it properties that lie between those of epoxy resins and coal tar. In physically modified resins, the secondary resin generally accounts for 30–50% of the total amount ； The properties of the products obtained after chemical modification of resins have undergone fundamental changes; vinyl ester resins are essentially the most typical examples of epoxy-based chemically modified resins. Sometimes, by using two or more resin materials with good comprehensive properties, and taking advantage of their respective characteristics to apply different structures in various parts of a project while proceeding with construction sequentially, significant results that are difficult to achieve with a single material can be obtained. Therefore, by adopting appropriate supporting solutions tailored to different corrosion environments, protective coatings with good cost-performance can be obtained.