發(fā)布時間：2018-04-02 11:26

  本文選題：冷噴涂　切入點：純鋁涂層　出處：《表面技術(shù)》2016年12期

【摘要】：目的研究冷噴涂純鋁涂層耐中性鹽霧腐蝕性能,為冷噴涂技術(shù)在海洋大氣防腐環(huán)境中的應用提供理論依據(jù)。方法采用冷噴涂技術(shù)在30Cr Mn Si A鋼基體上制備純鋁涂層,利用金相組織分析、XRD衍射分析、電化學測試、中性鹽霧試驗等技術(shù)方法,考察冷噴涂涂層試樣的耐腐蝕性能及其影響因素。結(jié)果冷噴涂涂層十分致密,隨著噴涂溫度和壓力的不斷提高,涂層的致密度不斷增加,在噴涂溫度為500℃、噴涂壓力為1.2 MPa、噴涂距離為25 mm及工作氣體為氮氣的工藝條件下,純Al涂層的孔隙率為0.5%,涂層中無氧化物存在,能夠有效隔絕腐蝕介質(zhì)和基體,為基體提供物理腐蝕防護。純Al涂層的腐蝕速率為4.935×10?7 A/cm2,并作為陽極為基體提供電化學腐蝕防護,中性鹽霧試驗1440 h后無腐蝕。腐蝕形貌分析表明,在表面鈍化膜防護及腐蝕產(chǎn)物的封閉作用下,冷噴涂純鋁涂層具有優(yōu)異的耐腐蝕性能,雖然發(fā)生一定腐蝕,但腐蝕速率較小,表面質(zhì)量良好,可以作為長效防腐涂層。結(jié)論冷噴涂純鋁涂層具有優(yōu)異的耐腐蝕性能,可以為鋼鐵材料提供長效效防護。
[Abstract]:Objective to study the corrosion resistance of cold sprayed pure aluminum coating to neutral salt spray, and to provide a theoretical basis for the application of cold spraying technology in marine atmospheric anticorrosion environment.Methods the pure aluminum coating was prepared on 30Cr mn Si A steel substrate by cold spraying technology. The microstructure analysis, electrochemical analysis, neutral salt spray test and so on were used.The corrosion resistance of cold sprayed coating samples and its influencing factors were investigated.Results the coating was very compact, and the density of the coating increased with the increasing of spraying temperature and pressure. Under the conditions of spraying temperature 500 鈩，

本文編號：1700196