A high-temperature annealing
treatment resistant single-component
chromium-free aqueous
silicon steel sheet insulated masking liquid is characterized in that the main ingredients include organic resin, inorganic water dispersion liquid, curing agent and other additives. The weight ratio of the components is as follows: 100 parts of the organic resin, 100-400 parts of inorganic matter, 5-30 parts of the curing agent, 1-20 parts of additive surface
active agent and the rest of water, and the
solid content of the masking liquid is 30-50 percent. The masking liquid does not contain toxic
organic solvent and chromate, has excellent performances of
coating appearance, adhesion, salt spray resistance, insulativity and the like, and can still keep good insulativity after going through high-
temperature stress annealing process. After a high-temperature annealing experiment (
nitrogen atmosphere, 750 DEG C / 2h), the interface resistance retention value is more than 70 percent. The curing speed of the masking liquid is fast, the curing is thorough, and the surface of the
membranous layer does not turn sticky for a long time of placement after curing. The masking liquid is in the form of
single component, has convenient use and can be stored for long time.