本文選題：塊狀納米晶工業(yè)純鐵 + 粗晶工業(yè)純鐵�。� 參考：《沈陽(yáng)工業(yè)大學(xué)》2017年碩士論文

【摘要】：隨著科技的發(fā)展,納米材料由于其優(yōu)異的物理、化學(xué)特性而被廣泛應(yīng)用于社會(huì)的各行各業(yè)。同時(shí),納米材料的耐蝕性能研究也受到人們的重視。對(duì)于材料的防護(hù)方法有很多種,其中鍍層防護(hù)技術(shù)由于工藝簡(jiǎn)單、設(shè)備易于操作而成為重要的防護(hù)手段。目前,人們大多使用普通塊體材料作為基體進(jìn)行鍍層的制備和防護(hù),而對(duì)塊狀的納米材料為基體研究制備的鍍層較少。實(shí)驗(yàn)中通過(guò)對(duì)深度軋制技術(shù)制備的塊體納米晶工業(yè)純鐵表面進(jìn)行鍍鎳防腐工藝研究,探討不同熱處理?xiàng)l件下基體及鍍層的腐蝕性能,為納米材料在防腐方面的應(yīng)用奠定基礎(chǔ)。因此課題研究具有一定的研究意義和使用價(jià)值。本文以塊體納米晶工業(yè)純鐵(NI)和分別經(jīng)過(guò)500℃和800℃1h保溫?zé)崽幚碇笮纬傻拇志ЧI(yè)純鐵(CP-500、CP-800)為基體,制備了電鍍時(shí)間分別為30s、60s、120s和240s以及厚度為5μm、10μm、15μm和20μm的Fe-Ni鍍層。利用掃描電鏡(SEM)和X射線衍射儀(XRD),觀察和分析了鍍層的表面形貌和微觀結(jié)構(gòu);采用電化學(xué)測(cè)試方法,測(cè)試了基體和不同厚度鍍層分別在0.1mol/L HCl和NaCl溶液介質(zhì)中的極化曲線和交流阻抗;采用浸泡方法,研究5μm和15μm鍍層在0.5mol/L HCl溶液中的腐蝕行為,進(jìn)一步比較了基體和鍍層的腐蝕性能,探討了腐蝕機(jī)理。同時(shí)文中對(duì)各種鍍層的硬度和結(jié)合力進(jìn)行了測(cè)試。SEM和XRD的結(jié)果表明:NI、CP-500、CP-800的平均晶粒尺寸分別為63nm、33μm和65μm。在電沉積初期,Ni在CP-500上的沉積量大于NI;在電鍍240s后,Ni的沉積量趨于一致,并且隨著鍍層厚度的增加,晶粒尺寸逐漸減小;同時(shí)發(fā)現(xiàn)NI的Ni晶粒尺寸小于同一厚度下的CP-500和CP-800。電化學(xué)測(cè)試結(jié)果表明:NI基體及其Ni鍍層的耐腐蝕性能分別優(yōu)于CP-500和CP-800基體及其在同一厚度下的Ni鍍層,并且隨著鍍層厚度的增加,耐腐蝕性能增強(qiáng)。基體及鍍層在0.1mol/L NaCl溶液中耐腐蝕性能優(yōu)于其在0.1mol/L HCl溶液中的耐腐蝕性能。浸泡試驗(yàn)結(jié)果表明:厚度為15μm的鍍層的腐蝕速率小于同一腐蝕時(shí)間下的厚度為5μm的鍍層,并且同一厚度的鍍層,NI的Ni鍍層的腐蝕速率更小。顯微硬度和結(jié)合力測(cè)試結(jié)果表明:NI基體及其鍍層的硬度大于CP-500基體及其鍍層,并且NI的Ni鍍層的結(jié)合力更好,隨著鍍層厚度的增加,硬度和結(jié)合力逐漸增大。
[Abstract]:With the development of science and technology, nanomaterials are widely used in various industries because of their excellent physical and chemical properties. At the same time, the study of corrosion resistance of nanomaterials has been paid more attention. There are many kinds of protection methods for materials, among which coating protection technology has become an important means of protection because of its simple process and easy operation of equipment. At present, most of people use ordinary bulk materials as the substrate to prepare and protect the coatings, but few coatings are prepared by studying the bulk nano-materials as the substrate. In the experiment, the corrosion resistance of substrate and coating of bulk nanocrystalline industrial pure iron prepared by deep rolling technology was studied, and the corrosion properties of substrate and coating under different heat treatment conditions were discussed, which laid a foundation for the application of nanocrystalline iron in anticorrosion. Therefore, the subject research has certain research significance and use value. In this paper, Fe-Ni coatings were prepared on the substrate of bulk nanocrystalline industrial pure iron (NII) and coarse crystalline industrial pure iron (CP-500 CP-800) after heat treatment at 500 鈩，

本文編號(hào)：1977193