| Physical and Chemical Properties | Chemical properties of gray cement. |
| Use | Use temperature <1 200 ℃. Performance characteristics of high temperature resistance. The main purpose is to fill and bond the local defects of metal and ceramic, such as acid-resistant tank, blast furnace lining, steel (iron) water temperature measurement probe, ingot mold and other high temperature equipment damage, fracture repair and bonding. |
pretreatment of the repaired surface shall ensure that there is no oil or water. for the repaired parts with high strength requirements, grinding, expanding or sandblasting shall be carried out, and the natural color of the substrate shall be polished. Special treatment should be carried out for some special working conditions. For example, when casting defects contain oil stains or water, flame barbecue should be used to remove them. For the surface polluted by chemical media, the arm should be washed with hot water and dried again, and sandblasting should be repeated many times. For the recovery of some shaft or hole wear dimensions, under the premise of ensuring sufficient strength, rough thread surfaces and dovetail grooves can be polished or turned to a depth of more than 1mm. The polished surface can be cleaned with absorbent cotton dipped in Tianshan cleaning agent or acetone to remove residual oil stains. New castings without oil and water can be exempted from this step.
The adhesive shall be fully mixed with the curing agent in strict accordance with A: B = 2:1 (mass ratio), with the same color as the best, and the applicable period is 60 min.
Use a scraper or glue knife to apply the mixed repair agent to the surface to be repaired. Apply a little first, press repeatedly with a scraper or glue knife to fully infiltrate the repair agent and the matrix, and then apply the remaining repair agent to leave a margin for processing.
In order to obtain higher temperature resistance, curing must be heated and heated step by step, 12 h at room temperature, 2 h at 60~80 ℃, and 2 h at 150 ℃.