退火工艺对真空蒸镀Zn-Mg镀层耐蚀性的影响
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摘要
为了研究不同的合金化退火工艺对真空蒸镀Zn-Mg合金镀层耐蚀性的影响,通过酸性盐雾试验、Na_2SO_4全浸泡腐蚀试验及电化学腐蚀试验对镀层的腐蚀特性进行了研究,并采用X射线衍射对腐蚀前后的相组成进行了分析。研究结果表明,真空蒸镀Mg层后,合金化退火工艺为410℃保温30 s时所得镀层的耐蚀性较好,在全浸腐蚀试验中,其耐蚀性约是纯Zn镀层的40倍。另外,合金化退火后在锌镁界面形成的共晶MgZn_2相和Mg_2Zn_(11)相有利于提高镀层的耐蚀性,Zn-Mg合金镀层在盐雾试验后生成的腐蚀产物所含组分的种类与纯Zn镀层的相似,主要由致密的碱式氯化锌[Zn_5(OH)_8Cl_2·H_2O]、碱式碳酸锌[Zn_4CO_3(OH)_6·H_2O]、Zn_5(CO_3)_2(OH)_6和少量的ZnO等构成。
The Zn-Mg alloy coatings were synthesized by vacuum plating on galvanized steel sheet.The effect of the annealing temperature/time on the corrosion resistance was investigated with X-ray diffraction and in acetic acid-salt spray(AASS),Na_2SO_4 full immersion corrosion and electrochemical corrosion tests.The results show that the optimized annealing conditions significantly enhanced the corrosion resistance of the Zn-Mg alloy coatings.To be specific,annealing at 410℃ for 30 s increased the corrosion resistance by 40 times in full immersion corrosion test,possibly because the corrosion resistance of the eutectic MgZn_2 and Mg_2Zn_(11) phases,formed at the interface of Zn and Mg layers in annealing,were five times higher than that of Zn-coating.Besides,the corroded products in AASA test comprise the compact Zn_5(OH)_8Cl_2·H_2O,Zn_4CO_3(OH)_6·H_2O,Zn_5(CO_3)_2(OH)_6 and a little ZnO,being similar to those of Zn-coating.
The Zn-Mg alloy coatings were synthesized by vacuum plating on galvanized steel sheet.The effect of the annealing temperature/time on the corrosion resistance was investigated with X-ray diffraction and in acetic acid-salt spray(AASS),Na_2SO_4 full immersion corrosion and electrochemical corrosion tests.The results show that the optimized annealing conditions significantly enhanced the corrosion resistance of the Zn-Mg alloy coatings.To be specific,annealing at 410℃ for 30 s increased the corrosion resistance by 40 times in full immersion corrosion test,possibly because the corrosion resistance of the eutectic MgZn_2 and Mg_2Zn_(11) phases,formed at the interface of Zn and Mg layers in annealing,were five times higher than that of Zn-coating.Besides,the corroded products in AASA test comprise the compact Zn_5(OH)_8Cl_2·H_2O,Zn_4CO_3(OH)_6·H_2O,Zn_5(CO_3)_2(OH)_6 and a little ZnO,being similar to those of Zn-coating.
引文
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[16] 毛鑫光,马进,颜秉熙,等.真空镀钢板锌镁合金防腐蚀镀层研究进展[J].真空科学与技术学报,2013,33(06):593-597
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[20] La J,Lee S,Hong S.Synthesis of Zn-Mg Coatings Using Unbalanced Magnetron Sputtering and theirs Corrosion Resistance[J].2014,259:56-61
[21] XI Z G,ZHANG Q F,JIANG S M,et al.Effect of the Process Parameters on the Microstructure and Corrosion Resistance of Zn-Mg Alloy Coatings Prepared Via a Combined PVD and Reaction-Diffusion Process[J].Surface and Coatings Technology,2016,306:418-427
[22] 刘秋元,江社明,高占勇,等.蒸镀锌镁合金镀层的组织及腐蚀行为[J].腐蚀与防护,2015,36(05):407-411
[23] Morishita M,Koyama K,Murase M,et al.Improvement in the Corrosion Resistance of Zinc-Plated Steel by Electrodeposition of Magnesium from a Molten Salt[J].ISIJ international,1996,36(6):714-719
[24] Morishita M,Koyama K,Mori Y.Inhibition of Anodic Dissolution of Zinc-Plated Steel by Electrodeposition of Magnesium from a Molten Salt[J].ISIJ international,1997,37(1):55-58
[25] Byun J M,Yu J M,Kim D K,et al.Corrosion Behavior of Mg2Zn11 and MgZn2 Single Phases[J].Korean Journal of Metals and Materials,2012,51:413-419
[26] Diler E,Lescop B,Rioual S,et al.Chemistry of Corrosion Products of Zn and MgZn Pure Phases Under Atmospheric Conditions[J].Corrosion Science,2012,65:178-186
[27] Volovitch P,Allely C,Ogle K.Understanding Corrosion Via Corrosion Product Characterization:I.Case Study of the Role of Mg Alloying in Zn-Mg Coating on Steel[J].Corrosion Science,2009,51:1251-1262
[28] Prosek T,Nazarov A,Bexell U,et al.Corrosion Mechanism of Model Zinc Magnesium Alloys in Atmospheric Conditions[J].Corrosion Science,2008,50(8):2216-2231
[29] 毛鑫光,马进,沈杰.真空蒸发制备带钢锌镁合金镀层的防腐蚀机制[J].腐蚀与防护,2013,34(07):557-561,565
[30] HUANG J H,LIU C P.The Influence of Magnesium and Hydrogen Introduction in Sputtered Zinc Oxide Thin Films[J].Thin Solid Films,2006,498,152-157
[31] Thébault F,Vuillemin B,Oltra R,et al.Inflience of Magnesium Content on the Corrosion Resistance of the Cut-Edges of Zn-Mg-Coated Steel[J].Corrosion Science,2015,97:100-106
[32] Kamimura T,Stratmann M.The Influence of Chromium on the Atmospheric Corrosion of Steel[J].Corrosion Science,2001,43:429-447
[33] 刘秋元.蒸镀锌镁合金镀层的制备与耐蚀性研究[D].包头:内蒙古科技大学,2014
[2] Prosek T,Persson D,Stoulil J,et al.Composition of Corrosion Products Formed on Zn-Mg,Zn-Al and Zn-Al-Mg Coatings in Model Atmospheric Conditions[J].Corrosion Science,2014,86:231-238
[3] Marder A R.The Metallurgy of Zinc-Coated Steel[J].Progress in Materials Science,2000,45(3):191-271
[4] Schwerdt C,Riemer M,K?ehler S,et al.Application Related Properties of Novel ZE-Mg Coated Steel Sheet[J].Stahl und Eisen,2004,124(9):69-74
[5] Nishimura K,Shindo H,Nomura H,et al.Corrosion Resistance of Hot-Dip Zn-Mg Galvanized Steel Sheet[J].Tetsu to Hagane,2003,89(1):174-179
[6] Kawafuku J,Katoh J,Toyama M,et al.Properties of Zinc Alloy Coated Steel Sheets Obtained by Continuous Vapor Deposition Pilot-Line[A].Proc 5th Automotive Corrosion and Prevention Conference,Michigan[C].USA:Philadelphia,1991:43-50
[7] Schwerdt C,Riemer M,K?ehler S,et al.A Study of the Application Related Properties of Novel Zn-Mg Coated Steel Sheet Produced in a Continuous Pilot Line[C].Proceedings of Galvatech 2004,the Iron and Steel Institute of Japan,Japan,2004
[8] Ferkous H,Talhi B,Barj M,et al.Investigation of the Ability of the Corrosion Protection of Zn-Mg Coatings[J].The Open Corrosion Journal,2009,(2):26-31
[9] Kawk Y J,Kim T Y,Lee D Y,et al.A Study of the Characteristics of Zn-Mg Alloy Coated Steel Sheet for Constructructional Appliances by PVD Process[C].8th International Coneference on Zn and Zn Alloy Coated Steel Sheet Galvatech 2011,AIM Italy and ASMET Austria,Italy:Genova,2011
[10] Michel B.Introduction to Novel Steels for Automobiles of Arcelor[J].Transaction of Iron and Steel,2007,(1):18
[11] Nakano H,Oue S,Kobayashi S,et al.Mg-Contained Zn Electroplating from Aqueous Solution Containing Quaternary Ammonium Salt[J].Tetsu to Hagane,2004,90(10):801-806
[12] Araga K,Shige H,Iwai M,et al.Zn-Mg Electroplated Metal Sheet and Fabrication Process[P].Eur:1036862,2000
[13] Nakakoji H,Nakajima S,Yasuda A,et al.Method of Producing a Steel Sheet Plated with Zinc-Magnesium Alloy Superior both in Plating Adhesion and Corrosion Resistance,and Sheets Plated[P].Eur:424856,1991
[14] Morishita M,Koyama K,Murase M,et al.Improvement in the Corrosion Resistance of Zinc-Plated Steel by Electrodeposition of Magnesium from a Molten Salt[J].ISIJ International,1996,36(6):714-719
[15] Koll T,Ullrich K,Faderl J,et al.Properties and Potential Applications of Novel ZnMg Alloy Coatings on Steel Sheet[J].Revue de Metallurgie/Cahiers d’ Informations Techniques,2004,101(7-8):543-546,548
[16] 毛鑫光,马进,颜秉熙,等.真空镀钢板锌镁合金防腐蚀镀层研究进展[J].真空科学与技术学报,2013,33(06):593-597
[17] Metzner C,Goedicke K,Hoetzsch G,et al.Electron Beam-Pvd for Enhanced Surface Properties on Metallic Strips and Sheets[J].Surface and Coatings Technology,1997,94-95:663-668
[18] Schuhmacher B,Schwerdt C,Seyfert U,et al.Innovative Steel Strip Coatings by Means of PVD in a Continuous Pilot Line:Process Technology and Coating Development[J].Surface and Coatings Technology,2003:163-164,703-709
[19] Yao C,Chen W,Gao W.Codeposited Zn-Mg Coating with Improved Mechanical and Anticorrosion Properties[J].Surface and Coatings Technology,2013,219:126-130
[20] La J,Lee S,Hong S.Synthesis of Zn-Mg Coatings Using Unbalanced Magnetron Sputtering and theirs Corrosion Resistance[J].2014,259:56-61
[21] XI Z G,ZHANG Q F,JIANG S M,et al.Effect of the Process Parameters on the Microstructure and Corrosion Resistance of Zn-Mg Alloy Coatings Prepared Via a Combined PVD and Reaction-Diffusion Process[J].Surface and Coatings Technology,2016,306:418-427
[22] 刘秋元,江社明,高占勇,等.蒸镀锌镁合金镀层的组织及腐蚀行为[J].腐蚀与防护,2015,36(05):407-411
[23] Morishita M,Koyama K,Murase M,et al.Improvement in the Corrosion Resistance of Zinc-Plated Steel by Electrodeposition of Magnesium from a Molten Salt[J].ISIJ international,1996,36(6):714-719
[24] Morishita M,Koyama K,Mori Y.Inhibition of Anodic Dissolution of Zinc-Plated Steel by Electrodeposition of Magnesium from a Molten Salt[J].ISIJ international,1997,37(1):55-58
[25] Byun J M,Yu J M,Kim D K,et al.Corrosion Behavior of Mg2Zn11 and MgZn2 Single Phases[J].Korean Journal of Metals and Materials,2012,51:413-419
[26] Diler E,Lescop B,Rioual S,et al.Chemistry of Corrosion Products of Zn and MgZn Pure Phases Under Atmospheric Conditions[J].Corrosion Science,2012,65:178-186
[27] Volovitch P,Allely C,Ogle K.Understanding Corrosion Via Corrosion Product Characterization:I.Case Study of the Role of Mg Alloying in Zn-Mg Coating on Steel[J].Corrosion Science,2009,51:1251-1262
[28] Prosek T,Nazarov A,Bexell U,et al.Corrosion Mechanism of Model Zinc Magnesium Alloys in Atmospheric Conditions[J].Corrosion Science,2008,50(8):2216-2231
[29] 毛鑫光,马进,沈杰.真空蒸发制备带钢锌镁合金镀层的防腐蚀机制[J].腐蚀与防护,2013,34(07):557-561,565
[30] HUANG J H,LIU C P.The Influence of Magnesium and Hydrogen Introduction in Sputtered Zinc Oxide Thin Films[J].Thin Solid Films,2006,498,152-157
[31] Thébault F,Vuillemin B,Oltra R,et al.Inflience of Magnesium Content on the Corrosion Resistance of the Cut-Edges of Zn-Mg-Coated Steel[J].Corrosion Science,2015,97:100-106
[32] Kamimura T,Stratmann M.The Influence of Chromium on the Atmospheric Corrosion of Steel[J].Corrosion Science,2001,43:429-447
[33] 刘秋元.蒸镀锌镁合金镀层的制备与耐蚀性研究[D].包头:内蒙古科技大学,2014