Is the corrosion resistance of special ceramics good?
2021 11/25
As an anti-corrosion material, epoxy resin not only has the characteristics of compactness, water resistance, good leakage resistance, high strength, etc., but also Alumina Ceramic Polishing Ring has good manufacturability such as strong adhesion, normal temperature operation, and simple construction, and the price is moderate. Anti-corrosion projects using this kind of materials generally include: resin sizing material auxiliary lining glass fiber reinforced plastic integral surface layer and isolation layer, resin mortar and mortar paving block material surface layer, resin mortar jointing and grouting block material surface layer, resin Single and composite integral surface layer and isolation layer made of thin cement or mortar, resin glass flake cement surface layer and so on. Depending on the variety of materials selected, the final product function and scope of application of the anti-corrosion project will be very different. According to experts, the epoxy resin commonly used in anti-corrosion engineering can be used alone, and can also be used in combination with unsaturated polyester resin, vinyl ester resin, phenolic resin and furan resin to form a composite structure to give full play to their respective Strengths, reduce costs, improve product quality, and facilitate construction. It can also be modified with other resins to form modified resins. The methods of modification include physical and chemical methods. Epoxy coal tar is a more typical physical modification product of epoxy resin, and Alumina Ceramic Polishing Ring its performance is between epoxy resin and coal tar. The secondary resin in the physical modified resin generally accounts for 30-50% of the total; after the chemical modification of the resin, the properties of the product have undergone fundamental changes, and the vinyl ester resin is essentially the most typical epoxy chemically modified resin. Sometimes two or more resin materials with better comprehensive performance are used. According to their characteristics, the different structures of different parts of the project are unified, and the sequential construction can produce significant effects that are difficult to achieve with a single material. Epoxy anticorrosive materials are mainly composed of the following materials. One is epoxy resin, which refers to a general term for polymers containing epoxy groups. It is mainly suitable for media that is not very corrosive. It has outstanding alkali resistance and can withstand general acid (except hydrofluoric acid) corrosion. It is anti-corrosion market abroad. The demand for epoxy resin has been greatly reduced. The main reason is that the unsaturated polyester resin in corrosion resistant resin has developed rapidly and there are many varieties. Due to the late start of unsaturated polyester resin in the domestic market, epoxy resin is still One of the main resin varieties in the field of anti-corrosion. The main characteristics of epoxy resin are Alumina Ceramic Polishing Ring high bonding strength, low shrinkage, high product brittleness, and high price. The use temperature of the resin cured at room temperature does not exceed 80℃; the second is the curing agent of epoxy resin, including amines and acid anhydrides. Among them, amine compounds are the most commonly used. They can be divided into aliphatic amines, aromatic amines and modified amines. Due to the Compounds such as amides and diethylenetriamine are more toxic and odorous, so they are gradually being replaced by non-toxic and low-toxic new curing agents (such as T31.590, C20, etc.). Such curing agents can also affect wet bases and even underwater. It can be cured, so it has attracted more and more attention and praise from people;