Preparation Of Organic-inorganic Composite High-temperature Corrosion Coating

The traditional inorganic heat-resisting coating has strong heat resistance, high hardness, but its function is less, and toughness is poor. Coating surface prone to cracking at high temperatures. For lack of inorganic heat resistant coatings on their performance, This paper discusses the modified inorganic heat resistant coatings research. And invented a kind of inorganic-organic composite film of functional heat resistant coatings. At the same time, study on the corrosion resistance. The results show that:at high temperatures this subject Prepared the paint not only has a good heat resistance and oxidation resistance, but also has a function of resistanting to other chemical mediators (such as acids, bases, salts) corrosion. Paper is divided into three parts:Parti, this experiment invented a new type of organic-inorganic composite sol, The experiment selected aqueous silica sol, MTMS,DMDPS as raw material, and used the experimental principle hydrolysis polycondensation to technology, Improved inorganic silica sol will appear poor toughness at high temperature, is easy to appear the crack defects, Analysed and discussed about the phenomenon in the experiment process and results. Discussion on the experimental process of silica sol and the pH value of the solution, inorganic acid selection, combination, R/Si variety of silicone values, influence of process as well as the total amount of organic matter on the experiment. Identified the preparation of new organic-inorganic composite optimum conditions sol:pH:4-4.65, pH adjusting agents used do HNO3, R/Si value is1.25, the weight ratio of organosilane to inorganic sol at11:10.Part2, Experimental used of new silicone resin as binder. Researched high temperature resistance coating formula and high temperature resistant mechanism. Experiment with anhydrous borax, zinc borate, titanium dioxide, mica, phosphate, boron and other commonly used anti-corrosion pigments and fillers for the study. By using different proportions affecting inorganic pigments and fillers for coating high temperature performance ratio. The optimum ratio of heat resistant coatings for Silicone is that:Mica:Anhydrous Borax:boron phosphate: Titanium dioxide:Zinc borate:iron red:=67:10:9:10:5:5:9.Part3, Experiments have detected high temperature performance, corrosion resistance and other basic properties of the resin and coatings. The results prove that the modified silicone resin having excellent heat resistance. While the heat resistance temperature of the coating is determined as600℃, and has good corrosion resistance.