本文選題：金屬腐蝕　切入點：水基防銹劑　出處：《天津科技大學》2017年碩士論文

【摘要】：硅酸鹽是一種環(huán)境友好型緩蝕劑,具有資源豐富、無毒、價格價廉、使用簡單等優(yōu)點。近年來采用硅酸鈉水溶液對鍍鋅鋼、鋁以及鋁合金和鎂合金進行表面處理的研究較多。硅酸鈉是硅酸鹽緩蝕劑中最主要的一種,但是硅酸鈉水溶液在常溫下形成的防銹膜遇水即溶,耐水性差,在室外容易遭到破壞,一定程度上縮短了防銹期。熱固化對硅酸鈉防銹劑的防銹性能具有重要影響,當達到一定固化溫度時,水分蒸發(fā),Si-OH幾乎全部縮合為Si-0-Si鏈的網狀結構。本文針對螺紋鋼和Q235鋼在使用過程中普遍存在的易腐蝕生銹問題,以硅酸鈉為原料制備了一種環(huán)保型水基防銹劑,通過電化學測試、掃描電鏡測試、膜層接觸角測試、露天耐候實驗、紅外光譜和鹽水浸泡等實驗等手段對常溫(25℃)下自然干燥的防銹膜以及經過熱固化處理的防銹膜性能進行評價,考察了硅酸鈉濃度、固化溫度以及固化時間對防銹膜性能的影響。結果表明:硅酸鈉水溶液濃度為0.8mmol/L,固化溫度為220℃,固化時間為3. 5h,形成的硅酸鈉防銹膜完整均勻且致密,構成Si-O-Si三維網狀結構,優(yōu)于未經固化的硅酸鈉防銹膜,成膜后鋼板的防銹期超過2個月,耐蝕性和耐水性均好于自然干燥的防銹膜。
[Abstract]:Silicate is a kind of environment-friendly corrosion inhibitor, which has the advantages of rich resources, non-toxic, cheap price, simple use, etc. In recent years, sodium silicate aqueous solution was used to galvanize steel. There are many studies on surface treatment of aluminum, aluminum and magnesium alloys. Sodium silicate is one of the most important corrosion inhibitors, but the antirust film formed by sodium silicate aqueous solution at room temperature dissolves in water and has poor water resistance. It is easy to be destroyed outside, which shortens the antirust period to a certain extent. Thermal curing has an important effect on the antirust performance of sodium silicate antirust agent, when the curing temperature is reached, Almost all of the water evaporated Si-OH condensed into the network structure of Si-0-Si chain. In this paper, a kind of environmental protection water-based rust inhibitor was prepared by using sodium silicate as raw material, aiming at the problem of corrosion and rust easily existed in the process of using rebar steel and Q235 steel. Through electrochemical test, scanning electron microscope test, film contact angle test, open weather test, The properties of natural drying antirust film and thermosetting antirust film were evaluated by infrared spectroscopy and salt water soaking, and the concentration of sodium silicate was investigated. The effect of curing temperature and curing time on the properties of antirust film was studied. The results showed that the concentration of sodium silicate solution was 0.8 mmol / L, the curing temperature was 220 鈩，

本文編號：1690938