Corrosion Behavior and Simulation Analysis of Silicate Adhesive under High Temperature and Abrasion-Acid Environment

Abstract

For studying the corrosion behavior and simulation analysis of silicate adhesive under high temperature and abrasion-acid environment, the corrosion behavior of silicate adhesive was tested with mechanical compression, scanning electron microscopic and X-ray diffraction (XRD), and analyzed under high temperature with finite element modeling. The results showed: under high temperatures and the abrasion-acid environment, the solid filler in the adhesive network structure will be exposed with the effect of particle wear. This will lead to a corrosion reaction between some fillers and hydrochloric acid, making dissolution loss. Large hollow holes will be formed at the loss part with the deepening of corrosion, the internal interconnection will occur, and the compression fracture curve characteristics of porous materials will appear, which will greatly reduce the compression strength of the materials. In special environments (temperature 200°C, flow rate 2m/s, and 31% concentration acid solution), hydrochloric acid corrosion is the control factor of silicate adhesive degradation.