About Flash Rust in Waterborne Coatings

Release Time:

2025-08-28

Finally, we recommend two anti-flash rust inhibitors with excellent performance: ① Enze chemical ck series anti-flash rust inhibitor, which is especially effective for flash rust problems at weld seams, submerged arc welding and cast iron parts; ② Anti-flash rust paint emulsion, which is a modified acrylate copolymer emulsion specially developed for anti-flash rust paint. They are developed and produced by Qingdao Enze Chemical Co., Ltd. These two anti-flash rust agents have very good performance, water-based paint drying process before, during and after the flash rust can be effectively prevented, especially in the difficult to solve the weld, cast iron and other metal surfaces anti-flash rust performance is excellent, and at the same time, can improve the adhesion of the paint to the substrate and salt spray resistance.

Water-based industrial paint to water as the main solvent, and the metal substrate is the biggest corrosion enemy is water, when the water-based coatings coated in the metal surface, which the H-bond in the water and the metal substrate ionic reaction, to achieve rapid corrosion, so in the construction and drying process is very easy to corrode, rust spots (points), a phenomenon known as flash rust, especially in the submerged arc welding or cast iron flash rust problem is not easy to be completely resolved. In the coating film is not yet dry before, other rust prevention measures such as zinc powder, anodized, inert and other anti-corrosion features have not yet played a role, this time the role of flash rust inhibitors will have to assume.

Different metal substrates, waterborne coatings construction process flash rust phenomenon and the degree of different, because of flash rust inhibitor selection and additive amount should also be based on the environment, materials and other factors are different. Most of the metal substrates, in solving the flash rust is not a problem, but need to consider the flash rust inhibitors, tank corrosion resistance and long-lasting corrosion resistance and other aspects of the balance. Since waterborne metal coatings are a very complex combination, each component of a waterborne acrylic coating will have more or less influence on the flash rust phenomenon. A simple method: add the flash rust inhibitor to deionized water in the recommended amount, add the droplets directly to the metal to be coated, and keep the droplets for 24 hours. The varieties that do not produce rust in this case can proceed directly to the next step. In addition, choosing the suitable flash rust inhibitor can not only solve the problem of flash rust, but also improve the long-term water resistance of the paint film, corrosion resistance in the tank and other comprehensive benefits.

Finally, we recommend two anti-flash rust inhibitors with excellent performance: ① Enze chemical CK series anti-flash rust inhibitor, which is especially effective for flash rust problems at weld seams, submerged arc welding and cast iron parts; ② Anti-flash rust paint emulsion, which is a modified acrylate copolymer emulsion specially developed for anti-flash rust paint. They are developed and produced by Qingdao Enze Chemical Co., Ltd. These two anti-flash rust agents have very good performance, water-based paint drying process before, during and after the flash rust can be effectively prevented, especially in the difficult to solve the weld, cast iron and other metal surfaces anti-flash rust performance is excellent, and at the same time, can improve the adhesion of the paint to the substrate and salt spray resistance.