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| 1 | Review of studies on corrosion of magnesium alloys显示文摘This review provided some recent progress of the research on corrosion mechanisms of magnesium and its alloys and a basis for follow-on research. Galvanic corrosion, pitting corrosion, intergranular corrosion (IGC), filiform corrosion, crevice corrosion, stress corrosion cracking (SCC), and corrosion fatigue (CF) were discussed. The influence of metallurgical factors such as alloying elements, microstructure and secondary phases, processing factors such as heat treatment and weld, and environmental factors including temperature, relative humidity, solution pH values and concentration on corrosion were discussed. In particular, a mechanism of pitting corrosion caused by AlMn particles was proposed. The corrosion properties of AZ91D weld material were investigated. | 曾荣昌 张津 黄伟九 W.DIETZEL K.U.KAINER C.BLAWERT 柯伟 | 2006 | 中国有色金属学会会刊:英文版2006，16，B02： | 32 |
| 2 | Corrosion behavior of Mg-Gd-Zn based alloys in aqueous NaCl solution显示文摘The corrosion behavior of Mg-10Gd-xZn(x=2,6 wt.%)alloys in 0.5 wt.%NaCl solution was investigated.Microstructures of both the alloys consisted of(Mg,Zn)_(3) Gd phase and lamellar long period stacking ordered(LPSO)phase.The morphology of the second phase at the grain boundary differed in both alloys:it was a continuous network structure in Mg-10Gd-6Zn,whereas it was relatively discrete in Mg-10Gd-2Zn.The dendrites were finer in size and highly branched in Mg-10Gd-6Zn.The corrosion results indicated that the increase in Zn content increased the corrosion rate in Mg-10Gd-xZn alloys.Micro-galvanic corrosion occurred near the grain boundary in both alloys initially as the grain boundary phase was stable and acted as a cathode,however,filiform corrosion dominated in the later stage,which was facilitated by the LPSO phase in the matrix.Severe micro-galvanic corrosion occurred in Mg-10Gd-6Zn due to the higher volume of second phase.The stability of the second phase at the grain boundary was altered and dissolved after the long immersion times.Probably the NaCl solution chemically reacted with the grain boundary phase and de-stabilized it during the long immersion times,and was removed by the chromic acid used for the corrosion product removal. | A.Srinivasan C.Blawert Y.Huang C.L.Mendis K.U.Kainer N.Hort | 2014 | Journal of Magnesium and Alloys2014，2，3： | 15 |
| 3 | Plasma electrolytic oxidation of AZ31 and AZ91 magnesium alloys:Comparison of coatings formation mechanism显示文摘The growth kinetics of PEO coatings on AZ31 and AZ91 magnesium alloys were studied and correlated with their structure,compositions(phase and elemental)and corrosion resistance.It was established that the coatings have a two-(outer and anodic)or three-layer structure(outer,inner and anodic)depending on the treatment time.Briefly,at short treatment time only an anodic layer and outer layer exists.Growth of the outer PEO layer takes place due to the micro discharges,which occur in vertical pores and voids with spherical cross-section.If the time is increasing,and electrolyte inside of the pores is heating-up,etching of the Mg substrate and oxide film becomes more dominant and horizontal pores in the interface between coating and metal are formed.In the pores new anodic layer will form and at this time the formation of the third inner layer starts.The growth of the inner layer happens via the anodic film as a result of micro discharge ignition in the horizontal pores,accompanied by formation of plasma in numerous micro-voids of this layer.The coatings formed on AZ91 alloy are denser,than those on AZ31,which is related to the difference in the rates of inner layer growth and dissolving of oxides which are located at the bottom of the horizontal pores.Because of the lower Al content,the AZ31 substrate itself and the also the oxide films are less stable and tend to dissolve at a higher rate compared to AZ91.Thus,it was demonstrated that a good corrosion resistance of the coatings was only obtained on AZ91 and if the average thickness of the coating is around 50μm,correlating with the formation of a sufficiently dense inner laye-Knowing this mechanism,a new two-step treatment was suggested,combining the standard PEO treatment with a subsequent PEO process in an electrolyte supporting the inner film formation.The concept was successfully applied and a further improved corrosion resistance was obtained compared to the single stage PEO process.This improvement of corrosion resistance was related to the better sealing of porosity and formation of a denser inner layer. | A.G.Rakoch E.P.Monakhova Z.V.Khabibullina M.Serdechnova C.Blawert M.L.Zheludkevich A.A.Gladkova | 2020 | Journal of Magnesium and Alloys2020，8，3： | 13 |
| 4 | AZ31镁合金激光焊件的力学性能和应力腐蚀行为(英文)显示文摘采用Nd-YAG激光对AZ31 HP镁合金进行激光自熔焊接。显微组织分析表明,使用或不使用填料(焊料)AZ61镁合金得到的激光焊接接头的平均晶粒尺寸大约为12μm,显微硬度和拉伸强度与母材相近。然而,慢应变速率拉伸表明,在ASTM D1384溶液中两种焊接接头的抗应力腐蚀性能比母材略差。可观察到应力腐蚀裂纹在焊缝金属萌生并向热影响区(HAZ)扩展。然而,在以AZ61镁合金为填料(焊料)获得的焊接接头中,观察到裂纹起源及扩展出现在热影响区(HAZ)。在慢应变速率拉伸试验中,由于试样表面暴露在腐蚀环境中,在氢氧化镁/氧化镁层形成局部损伤,从而导致应力腐蚀裂纹的生成。 | P.B.SRINIVASAN S.RIEKEHR C.BLAWERT W.DIETZEL M.KO AK | 2011 | Transactions of Nonferrous Metals Society of China2011，21，1： | 4 |
| 5 | 镁表面Nafion聚/吡咯与Nafion二/甲基亚砜有机涂层耐蚀性能的研究显示文摘采用浸镀法在镁基体表面制备了Nafion聚/吡咯和Nafion二/甲基亚砜(DMSO)有机涂层,利用光学显微镜和电化学测量系统研究了有机涂层的形貌及其耐蚀性能。结果表明,Nafion聚/吡咯有机涂层的厚度随着浸镀次数的增加几乎不变,且Nafion聚/吡咯有机涂层降低了镁的耐蚀性能;而Nafion/DMSO有机涂层的厚度则随着浸镀次数的增加而线性增加,并且Nafion/DMSO有机涂层能有效地改善镁的耐蚀性能,耐蚀性能随着涂层厚度的增加而提高。与无涂层的试样相比,耐蚀性能最高提高18倍。 | 宋仁国 郑晓华 杨芳儿 C.Blawert W.Dietzel | 2007 | 材料保护2007，40，1： | 3 |
| 6 | Progress and Challenge for Magnesium Alloys as Biomaterials显示文摘 | R.Zeng W.Dietzel F.Witte N.Hort C.Blawert | 2008 | Adv Eng Mater2008，，8： | 2 |
| 7 | Progress and Challenge for Magnesium Alloys as Biomaterials显示文摘 | R.Zeng W.Dietzel F.Witte N.Hort C.Blawert | 2008 | Adv Eng Mater2008，，8： | 1 |
| 8 | Progress and Challenge for Magnesium Alloys as Biomaterials显示文摘 | R.Zeng W.Dietzel F.Witte N.Hort C.Blawert | 2008 | Mater2008，，8： | 1 |
| 9 | Evolution of PEO coatings on AM50 magnesium alloy using phosphate-based electrolyte with and without glycerol and its electrochemical characterization显示文摘PEO coatings were synthesized from phosphate-based (bP-PEO) and glycerol added phosphate-based (gP-PEO) electrolytes with differentprocessing times. For both bP-PEO and gP-PEO coatings treated with different processing time its morphology, elemental and phase composition,and electrochemical behaviour has been comparatively investigated. For this, scanning electron microscope (SEM), energy-dispersiveX-ray spectroscopy (EDXS), X-ray diffraction, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization techniqueswere employed. The gP-PEO coatings were observed to have higher pore density with reduced pores size, surface porosity, and averagecoating thickness compared to bP-PEO for all the PEO processing time. XRD studies revealed that glycerol addition resulted in the fosteringof crystalline MgO (periclase) phase and promoting Mg3(PO4)2 (farringtonite) phase amorphization. In general, electrochemical behaviourshowed improved corrosion behaviour for gP-PEO compared to bP-PEO. | Ashutosh Jangde S.Kumar C.Blawert | 2020 | Journal of Magnesium and Alloys2020，8，3： | 1 |
| 10 | In situ formation of LDH-based nanocontainers on the surface of AZ91 magnesium alloy and detailed investigation of their crystal structure显示文摘In the presented work, the possibility of direct synthesis of LDH(layered double hydroxide) on the AZ91 surface in the presence of a chelating agent(diethylenetriaminepentaacetic acid-DTPA) is reported. Conversion layer of LDH nanocontainers were formed under ambient pressure conditions without carbonate addition in the electrolyte. The obtained LDH was characterized using experimental(SEM,XRD, TGA, XPS, Raman, etc.) and computational methods(thermodynamic calculation, modeling of possible LDH crystal structures). A comparison of three possible LDHs(LDH-OH,-NO_(3) and-CO_(3)) was performed. Based on the experimental results and crystal simulation approach, it was confirmed, that the mixed LDH-OH/CO_(3) is grown on the surface in the presence of DTPA pentasodium salt. | Tatsiana Shulha M.Serdechnova M.H.Iuzviuk I.A.Zobkalo P.Karlova N.Scharnagl D.C.F.Wieland S.V.Lamaka A.A.Yaremchenko C.Blawert M.L.Zheludkevich | 2022 | Journal of Magnesium and Alloys2022，10，5： | 0 |
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