Solvent-free coatings often dry very quickly. How can this issue be resolved? Speaking of solvent-free coatings, they represent a significant development direction in the industrial heavy-duty anti-corrosion sector. The term "solvent-free" means the coating contains no solvents and requires no additional thinners, making it a corrosion-resistant product that can be applied directly via spraying. It is also highly environmentally friendly, as it contains almost no VOCs. Therefore, it is primarily used in equipment such as drinking water pipelines and water tanks. Today, using water tank anti-corrosion as an example, let’s discuss how solvent-free coatings should be applied.

First, solvent-free coatings have higher viscosity. If conventional air spray is used, the coating is prone to condensing at the spray gun nozzle, which can cause clogging. Therefore, high-pressure airless spraying is required. This method uses high pressure to fully atomize the viscous solvent-free coating, ensuring it adheres evenly to the surface of the water tank.

Second, the application temperature should not exceed 42°C, as the curing reaction of solvent-free coatings is highly sensitive to temperature. When the temperature exceeds the threshold, the curing agent inside the coating rapidly reacts with the resin, causing the coating to cure quickly in a short time.

Third, solvent-free coatings have a short pot life. Therefore, during application, the principle of "small batches, multiple mixes" should be followed. This not only minimizes coating waste and reduces application costs but also ensures that the coating is in optimal condition for each use, avoiding issues such as over-curing that could affect the spraying results. Fourth, solvent-free coatings are environmentally friendly. They do not release irritating odors during application, keeping the worksite air fresh. This helps prevent health issues such as respiratory diseases among workers caused by inhaling harmful gases.