Influence Factors of Drying Speed on Water-based Self-drying / Fast-drying Foundry Coatings

Factors affected drying speed of energy saving and environment friendly water-based self-drying / fast-drying foundry coatings and its regularity changing were analyzed. The results show that the self-drying speed of coating is improved significantly with the decrease of humidity and the increase of temperature, the coating is able to naturally dry in about 2 hours under the condition of 25 and 80% RH °C , the self-drying speed of coating increases in an approximately linear manner with the decreasing of its thickness, the hot air quick drying time of the water-based self-drying / fast-drying coating is 3.5~7.0min when the thickness of coatings is 0.3~0.8 mm and the hot air temperature is 80 ±5 °C °C.