钢铁件由于长期处在气氛包围、水质浸渍和不同介质侵蚀的环境中,因而受到不同程度的腐蚀。全世界每年生产的钢铁约有十分之一变为铁锈;大约30％的锅铁设备因腐蚀而损坏,同时还带来跑、冒、滴、漏、停产和环境污染等事故,造成重大经济损失。目前对于钢铁件的腐蚀,我国基本上还是采用油漆防护。防护期一般为 Due to long-term in the atmosphere surrounded by the environment, water quality and environmental erosion of different media, and therefore subject to varying degrees of corrosion. About one-tenth of the steel produced in the world each year becomes rust; about 30% of the iron and steel equipment is damaged due to corrosion, and accidents such as running, running, dripping, leakage, shutdown and environmental pollution are caused, causing major economic loss. At present, for the corrosion of steel parts, our country basically adopts paint protection. The general protection period is