Preparation And Properties Of Epoxy Based Anticorrosive Material With Reactive Solvent For Concrete Structure

Concrete corrosion has negative influence on many infrastuctures and facilities including residential houses, roads, bridges, hydropowering facilities and maritime projects, et. al. The corrosion not only causes huge economic losses but also jeopardizes the safety of human lives and their property. Therefore, developing effective anticorrosion for concrete structures is significant for the development of economy and national defense. In this study, we have prepared a set of epoxy based anticorrosive materials with various reactive solvents as dispersion medium, including F/A/Ep based penetrative solidified anticorrosive material, MIBK/Ep based penetrative solidified material and solventless epoxy anticorrosive coating. The main results are as follows:Firstly, we have prepared F/A/Ep based penetrative solidified anticorrosive material and studied its basic physics properties, permeation properties and anticorrosion properties. Our results show that the coating has remarkable basic physics properties with an excellent dry/ wet adhesion of 10.9MPa and 6.9MPa, respectively, which has a notable reinforcing effect on the mortar. The coating has a good wetting ability to the mortar with a penetration of 3.5mm into the surface of mortar. The permeation studies of the material and mortar demonstrate that the material has a better wetting ability to mortar than those of most organic solvents with small viscosity. In addition, the coating exhibits a good anticorrosion performance that it can be remained undamaged after immersion in 10% NaOH solution and 5% sulfuric acid for 28 days.Secondly, ketone can react with the primary amine to form the ketimine, and hence condensation reaction between epoxy, amine and ketone can result in polymers. In this work we have studied the reactivity of ketone in the condensation reaction. Eventually, MIBK was chosen as the reactive solvent for penetrative solidified epoxy anticorrosive material because of its performance in both reactivity and permeation. We have studied the influence of different glycidyl ether and its usage, different curing agents and the modification via the Aldol condensation on the coating properties. The studies show that this MIBK/Ep based penetrative solidified material has a good transparency with a transmittance of 80%. the material with cardanol aldehyde amine curing agent show good physicsal properties, permeation and anticorrosion properties. Based on this system, an optimum coating performance can be achieved by using bifunctional glycidyl ether and with a mass ratio of 1/2 to the MIBK.Thirdly, a reactive solvent glycidyl ether A was used to prepare a solventless epoxy anticorrosive coating as the dispersion medium of epoxy resin. Our studies demonstrate that the coating has good basis physical performance and corrosion resistance, which were also certified by an independent testing organization. We have also studied its construction technology in an aquaculture pool and improved the construction technology.