Metals are inherently unstable and have a tendency to revert to their more stable mineral forms due to chemical reactions with their environment. At a high level, that's corrosion.
Corrosion silently deteriorates metal, slowly degrading material integrity over time. The reaction between the metal and its environment - rain, snow, humidity, salt air, chemicals, etc. - begins when water and oxygen in the environment come into contact with the metal. 氧化物体积膨胀大约是原始金属的两到四倍。氧化物的体积膨胀会导致氧化层破裂，令水和氧气渗入，进而产生更多的锈蚀。
How quickly corrosion causes deterioration, and the kind of corrosion depends on the metal type and environmental conditions - and the metal protection used to coat the substrate. Two coating technologies that are widely used to deliver corrosion protection for a variety of applications include flash rust inhibitors and adhesion promoters. These additives are used to protect metal substrates like ferrous metal, zinc alloy and aluminum from corrosion and improve direct-to-metal adhesion, as well as intercoat adhesion.
克服腐蚀挑战
Protecting metal from corrosion presents multiple challenges, which can depend on factors like metal type, environmental conditions and the end-use application. Cost and complexity is one of the challenges to overcome, especially as end users want to minimize costs by reducing the number of coats needed. More end users want to move away from a primer, midcoat and topcoat and more toward direct-to-metal coatings (DTM). With DTM coatings, one layer of coating has to do the same job of providing adhesion, corrosion and resistance to weathering that was previously done by three layers of coatings.
VOC regulations are another challenge, which has meant moving to more water-borne coatings. Not all water-borne coatings provide the same performance as solvent-borne coatings, which is why additives that can enhance the performance of the coating are becoming increasingly more important.
闪锈抑制剂
Flash rust inhibitors are called upon to enable the metal used in machinery, equipment, cans, coils and more to stand up to a variety of conditions that can cause corrosion. They prevent or delay the formation of flash rust on metal surfaces, which can happen when exposed metal surfaces rapidly develop a layer of rust due to exposure to oxygen and moisture in the air.
Flash rust inhibitors are always needed in water-borne metal coatings because water is used as a solvent, as well as in direct-to-metal (DTM) coatings because they come in direct contact with the metal without the use of a primer. As soon as water comes in contact with the substrate, it can begin forming flash rust. 面漆中则不需要使用闪锈抑制剂，因为已经在基材上涂覆了一层底漆。
粘合促进剂
Achieving strong adhesion between the corrosion protection coating and the metal substrate is critical for long-term performance. That's why adhesion promoting additives are used so the coating tightly adheres to the substrate to prevent water and other species from getting to the metal substrate, slowing down or preventing corrosion for an extended period of time. Water will eventually get to the metal, but a good adhesion promoter can significantly slow it down. Both adhesion promoters and flash rust inhibitors can be used simultaneously to deliver additional benefits.
路博润防腐蚀添加剂
Lubrizol has developed multiple technologies to protect metal from corrosion and improve direct-to-metal adhesion, as well as intercoat adhesion. These additives are compatible in both water-borne and solvent-borne coating systems, and react with the metal to deliver desired properties without impacting the stability of the coating system. They can be incorporated as a component in DTM coatings, primers or wash primer formulations.
Lubrizol adhesion promoters and flash rust inhibitors are proven in a variety of applications, including:
- 汽车设备制造商及VR涂料
- 罐体涂料
- 卷钢涂料
- 商业运输涂料
- 液体屋顶涂料（用于金属屋顶）
- 防护涂料
- 一般金属表面
Lubrizol flash rust inhibitor technologies are designed to protect ferrous metal, zinc alloy and aluminum substrates. Lubrizol adhesion promoters are polymeric phosphate esters used to improve the adhesion of a wide variety of solvent-borne and water-borne coatings to metal substrates. They are proven to improve the adhesion of coatings to a variety of metal substrates. These additives are especially effective on aluminum, but also work well on cold-rolled and galvanized steel and can even improve adhesion to poorly prepared surfaces.
金属颜料钝化
Certain Lubrizol adhesion promoters can also be used to protect untreated metallic pigments, such as aluminum flake and mica-based effect pigments, from degradation in water-borne coatings by passivation of the pigment surface. 颜料表面的钝化还可以提高溶剂型金属效果涂料的耐湿性。 Passivation of untreated metallic and effect pigments using Lubrizol adhesion promoters is a cost-effective formulation strategy for achieving stable and consistent color and appearance matches in water-borne coatings.