Corrosion prevention: The steam pipes of ships usually use aluminum silicate wrapping with asbestos added to achieve the purpose of heat insulation. However, due to leakage or the generation of condensed water caused by alternating hot and cold conditions, the condensed water accumulates on the outer wall of the steam pipes at the bottom. Moreover, the outer walls of the steam pipes are severely corroded due to the long-term effects of high temperature and soluble salts. Therefore, a series of water glass adhesives can be used as the coating material at the bottom layer of the aluminum silicate to form a coating layer similar to enamel. Its coefficient of thermal expansion is close to that of the pipe material, the thermal stress is small, and it will not crack. In mechanical installation, components are often fixed with bolts. Devices fixed by bolts are exposed to the air for a long time, which will cause crevice corrosion. During the operation of the machinery, sometimes the bolts will loosen due to intense vibration. To solve this problem, in mechanical installation, the connected components can be bonded with inorganic adhesives first, and then connected with bolts. In this way, it can not only play a role in reinforcement but also achieve the effect of corrosion prevention.
Biomedical applications: Hydroxyapatite bioceramics have a composition close to the inorganic components of human bone tissue, possess good biocompatibility, and can form a firm chemical bond with bones, making them an ideal substitute material for hard tissues. However, the commonly prepared HA implants generally have a high elastic modulus, low strength, and unsatisfactory activity. Phosphate glass adhesives can be selected. Through the action of the adhesives, the HA raw material powder is bonded together at a temperature lower than the traditional sintering temperature, thereby reducing the elastic modulus and ensuring the activity of the material. Cohesion Technology Co., Ltd. announced that they have developed a Coseal sealing adhesive that can be used for heart bonding and has been successfully applied in clinical practice. Through a comparative use in 21 cardiac surgeries in Europe, it was found that the use of Coseal in surgeries significantly reduced surgical adhesions compared to other methods. Subsequent preliminary clinical studies have shown that the Coseal sealing adhesive has great development potential in cardiac, gynecological, and abdominal surgeries. The application of adhesives in the medical field is regarded as a new growth point of the adhesive industry. Structural adhesives are composed of epoxy resins or unsaturated polyesters.
In national defense technology: Stealth submarines are one of the symbols of the modernization of naval equipment. An important method for submarine stealth is to lay anechoic tiles on the outer shell of the submarine. Anechoic tiles are a kind of rubber with sound absorption performance. To achieve a firm combination between the anechoic tiles and the steel plate of the submarine hull, it depends on adhesives. Applications in the military field include: tank maintenance, military ship assembly, bonding of thermal protection layers for light bombers of military aircraft and missile warheads, preparation of camouflage materials, and prevention and counteraction of terrorism.
