摘要
多道富锌基涂层的电化学行为研究表明,涂层中的Zn粉未表现出明显的阴极保护作用,即使在富锌涂层上覆盖几个微米厚的环氧清漆涂层, Zn的阴极保护作用也会变得非常微弱. Zn粉对钢铁的保护作用在于Zn粉腐蚀产物对涂层的“自修复能力”.在环氧清漆覆盖条件下,无机富锌涂层中Zn粉的反应活性比有机富锌涂层中Zn粉的高,即Zn粉的反应速度更快.
The electrochemical behaviors of the zinc-rich paints based multilayer organic coatings in 3.5% NaCl solution were studied. The results show that the zinc powder has a minor cathodic protection effect. The protection effect is due to the repair of holes by the corrosion product of zinc powder. Under the epoxy topcoat, the corrosion rate of the zinc powder in inorganic zinc-rich coatings is faster than that in organic type.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第7期749-753,共5页
Acta Metallurgica Sinica
基金
国家重点基础研究发展规划项目G19990650
国家自然科学基金项目50201015资助
关键词
富锌漆
环氧涂层
多道涂层
电化学阻抗谱
阴极保护
zinc-rich paint
epoxy coating
multi-layer coating
electrochemical impedance spectroscopy
cathodic protection
