發(fā)布時間：2018-10-17 10:48

【摘要】：為了進(jìn)一步研究無機(jī)富鋅底漆中鋅粉形狀對涂層及其復(fù)合涂層防腐蝕性能的影響,分別選用球狀和片狀鋅粉制備了無機(jī)富鋅底漆,并與H702環(huán)氧云鐵中間漆、H703灰環(huán)氧面漆一起構(gòu)成了重防腐蝕復(fù)合涂層體系。通過鹽霧腐蝕和電化學(xué)交流阻抗譜技術(shù)研究了無機(jī)富鋅底漆涂層及其復(fù)合涂層的防腐蝕性能。結(jié)果表明:片狀無機(jī)富鋅底漆涂層的耐蝕性能更強(qiáng),經(jīng)過長時間的鹽霧腐蝕沒有出現(xiàn)明顯的腐蝕產(chǎn)物;復(fù)合涂層交流阻抗譜的Bode中低頻阻抗模值在較長時間內(nèi)穩(wěn)定在107Ω·cm2左右,Nyquist譜中的容抗弧半徑明顯增大,片狀復(fù)合涂層的防腐蝕性能優(yōu)于球狀復(fù)合底漆涂層。
[Abstract]:In order to further study the effect of zinc powder shape in inorganic zinc rich primer on the corrosion resistance of the coating and its composite coating, the inorganic zinc rich primer was prepared by using spherical and flake zinc powder, respectively. With H702 epoxy iron intermediate paint and H703 grey epoxy topcoat, a heavy corrosion resistant composite coating system was formed. The corrosion resistance of inorganic zinc rich primer coating and its composite coating were studied by salt spray corrosion and electrochemical impedance spectroscopy. The results showed that the corrosion resistance of flake inorganic zinc-rich primer coating was stronger and no obvious corrosion product appeared after long time salt spray corrosion. The low and medium frequency impedance modulus of Bode of composite coating is about 107 惟 cm2 in a long time, the arc radius of Nyquist spectrum increases obviously, and the corrosion resistance of flake composite coating is better than that of spherical composite primer coating.
【作者單位】： 武漢大學(xué)物理科學(xué)與技術(shù)學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(21174108)資助
【分類號】：TG174.45

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