金属表面涂漆,除了赋予外形装饰性能以外,还在于保护金属防止腐蚀,延长其使用寿命。不论水下用漆,还是户外耐候涂料,它们的老化损坏都与水汽的透入漆膜有关,而且底层金属的腐蚀与否,也与透入的水汽有直接关系。所以水汽在漆膜内的渗透 Metal surface paint, in addition to giving shape decorative performance, but also lies in the protection of metals to prevent corrosion, to extend its service life. Regardless of underwater paint, or outdoor weathering coatings, their aging damage and water vapor permeation of the film, and the corrosion of the underlying metal or not, but also directly with the penetration of water vapor. So water vapor in the paint infiltration