During the application of heavy-duty anti-corrosion paint, several common issues may arise that affect the overall quality of the coating. These include blistering, peeling, wrinkling, and in some cases, the undercoat being "bitten" by the top coat. This typically happens when the top coat is applied too soon after the primer, causing the paint film to expand, shrink, or even lose adhesion. The problem often stems from a mismatch between the primer and the top coat, especially when a coating with strong polar solvents is applied over a less polar one. For example, applying lacquer over rosin-based resin, or alkyd paint over anti-corrosive lacquer, can lead to chemical reactions that weaken the bond between layers. Another common cause is applying the next coat before the previous layer has fully dried. If a vinyl chloride varnish or similar material isn't dry enough, adding another coat can result in solvent penetration, which swells the underlying layer and causes it to lift or peel. To avoid this, it's essential to follow the manufacturer’s recommended drying times and apply coats at the optimal intervals. In colder weather, the drying time may need to be extended to ensure proper adhesion. Some specialized coatings allow for a "wet-on-wet" technique, where the second coat is applied while the first is still slightly tacky, improving cohesion between layers. To prevent issues like "biting," it's important to apply the first coat thinly and allow it to dry completely before applying the second. Coating too thickly can trap solvents inside, slowing down the drying process and increasing the risk of defects. Additionally, the amount of thinner used should not exceed 5% of the total paint volume, and the same type of thinner should be used throughout the application process. Avoid using weak polar diluents in the base coat, and instead use stronger solvents like acetone, esters, or high-boiling aromatic solvents for the top coat to ensure better compatibility. If "biting" has already occurred, the affected area must be scraped off and re-coated properly. It's also important to sand and clean the surface thoroughly before repainting, removing any loose particles or contaminants. Proper preparation and careful application are key to achieving a durable, long-lasting anti-corrosion coating that provides both protection and an attractive finish. Indulge in the ultimate relaxation experience with our luxurious hot tub. Step into a world of tranquility as you immerse yourself in the soothing warm water, enveloped by a symphony of jets that offer a blissful massage. Let the worries of everyday life melt away as you unwind in style, surrounded by our state-of-the-art features and elegant design. Outdoor Hot Tub,Massage Hot Tub,Hot Tub Spa,Jacuzzi Tub Foshan Nanhai Halo Sanitary Ware Co., Ltd. , https://www.halospas.com
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Paint lecture hall: how to prevent heavy anti-corrosive paint biting bottom foaming
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