Hard anodizing of AA2011-T3 Al-Cu-Pb-Bi free-cutting alloy: improvement of the process parameters
Source abstract
Abstract
Abstract The free-cutting Al-Cu-Pb-Bi alloy AA2011-T3 has been anodized in a traditional sulphuric bath with the aim of producing hard and uniform oxides of technological interest. H2SO4 concentration, electrolyte temperature, Al3+ concentration and current density have been modified. The effect of each process parameter has been evaluated through Potential-vs-time plot, coating hardness, coating thickness, volumetric expansion-ratio and coating defectiveness. SEM analysis has shown that Bi-based intermetallics are the main responsible for the severe defective state. Higher H2SO4 concentration and higher current density have improved coating hardness and defectiveness, however potentiodynamic polarizations have revealed that they do not enhance corrosion resistance.
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Research context
OpenAlex topics: Anodic Oxide Films and Nanostructures · Aluminum Alloy Microstructure Properties · Corrosion Behavior and Inhibition
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (47)
Show source-provided references
1. Vasudevan · 1989 · vol. 31
2. Machinability aspects of new Al-Cu alloys intended for automotive castings10.1016/j.jmatprotec.2010.06.006 ↗
3. Effect of lead and bismuth element on the cutting char- acteristics in Al–Cu alloys
4. Electrochemical characteristics of intermetallic phases in aluminum alloys10.1149/1.1869984 ↗
5. Stress corrosion cracking of sensitized AA5083 (Al-4.5Mg-1.0Mn)10.4028/www.scientific.net/MSF.396-402.1437 ↗
6. Microconstituent-induced pitting corrosion in aluminum alloy 2024-T310.5006/1.3292099 ↗
7. Electrochemical characteristics of the Al2Cu, Al3Ta and Al3Zr intermetallic phases and their relevancy to the localized corrosion of Al alloys10.1016/0010-938X(93)90148-A ↗
8. A compilation of corrosion potentials reported for intermetallic phases in aluminum alloys10.1149/1.2048447 ↗
9. A closer look at constituent induced localised corrosion in Al-Cu-Mg alloys10.1016/j.corsci.2016.10.018 ↗
10. Sheasby · 2001 · vol. 2 · 743
11. Porous anodic alumina: fabrication, characterization and applications10.1016/S0040-6090(96)09440-0 ↗
12. Precipitates and intermetallic phases in precipitation hardening Al–Cu–Mg–(Li) based alloys10.1179/174328005X14357 ↗
13. Characterisation of Al-Cu and Al-Mg-Si free-cutting alloys10.4028/www.scientific.net/MSF.794-796.1181 ↗
14. The behaviour of second phase particles during anodizing of aluminium alloys10.1016/j.corsci.2010.03.029 ↗
15. On the nature of the Fe-bearing particles influencing Hard anodizing behavior of AA 7075 extrusion products10.1016/S0257-8972(97)00102-3 ↗
16. The influence of constituent particles on the quality of hard anodic coatings on fully heat treated AA 7075 extrusion products10.4028/www.scientific.net/MSF.217-222.1617 ↗
17. Voltage transients and morphology of AlSi(Cu) anodic oxide layers formed in H2SO4 at low temperature10.1016/S0257-8972(02)00144-5 ↗
18. Preferential anodic oxidation of second-phase constituents during anodising of AA2024-T3 and AA7075-T6 alloys10.1002/sia.3191 ↗
19. Reaction rates of second-phase constituents in aluminium during etching, brightening and oxalic acid anodizing processes10.1080/00202967.1968.11870048 ↗
20. Behavior of intermetallic compounds in aluminium during sulfuric acid anodizing
21. Modelling the anodizing behaviour of aluminium alloys in sulphuric acid through alloy analogues10.1016/j.corsci.2008.09.019 ↗
22. Macroscopic and local filming behavior of AA2024 T3 aluminum alloy during anodizing in sulfuric acid electrolyte10.1149/1.2931522 ↗
23. Influence of Fe-bearing particles and nature of electrolyte on the hard anodizing behaviour of AA 7075 extrusion products10.1016/S0257-8972(97)00102-3 ↗
24. Anodic film growth on Al-Li-Cu alloy AA2099-T810.1016/j.electacta.2012.06.126 ↗
25. Anodic film growth in the Al-Ta alloy system10.1016/S0010-938X(02)00252-4 ↗
26. Void formation and alloy enrichment during anodizing of aluminium alloys containing cadmium, indium and tin10.1016/S0010-938X(98)00098-5 ↗
27. Properties and application of lead-calcium-tin-aluminium-bismuth alloys for positive grids10.1016/j.jpowsour.2005.11.020 ↗
28. A review of soft-lead specifications in the light of the requirements of valve-regulated lead/acid batteries10.1016/S0378-7753(97)02511-1 ↗
29. Influence of substrate microstructure on the growth of anodic oxide layers10.1016/j.electacta.2003.10.024 ↗
30. Anodisation of sputter deposited aluminium – titanium coatings : effect of microstructure on optical characteristics10.1016/j.surfcoat.2014.05.073 ↗
31. Structure of anodized Al – Zr sputter deposited coatings and effect on optical appearance10.1016/j.apsusc.2014.09.037 ↗
32. FIB-SEM investigation of trapped intermetallic particles in anodic oxide films on AA1050 aluminium FIB-SEM investigation of trapped intermetallic particles in anodic oxide films on AA1050 aluminium10.1108/00035591111148885 ↗
33. Ultramicrotomy a route towards the enhanced understanding of the corrosion and filming behaviour of aluminium and its alloys10.1016/S0010-938X(98)00006-7 ↗
34. Cyclic oxidation processes during anodizing of Al–Cu alloys10.1016/j.electacta.2007.05.052 ↗
35. Copper enrichment in Al-Cu alloys due to electropolishing and anodic oxidation10.1016/S0040-6090(96)09117-1 ↗
36. Pulsed current effect on hard anodizing process of 2024-T3 aluminium alloy10.1016/j.surfcoat.2016.01.056 ↗
37. Pulsed current hard anodizing of heat treated aluminum alloys: frequency and current amplitude influence10.1016/j.surfcoat.2016.10.025 ↗
38. Anodizing of multiphase aluminium alloys in sulfuric acid: in-situ electrochemical behaviour and oxide properties10.1016/j.electacta.2016.06.131 ↗
39. The influence of higher surface hardness on fretting fatigue life of hard anodized aerospace AL7075-T6 alloy10.1016/j.msea.2012.09.082 ↗
40. Effect of anodic oxidation on fatigue performance of 7075-T6 alloy10.1016/j.surfcoat.2008.06.049 ↗
41. Coupled effects of substrate microstructure and sulphuric acid anodizing on fatigue life of a 2017A aluminum alloy10.1016/j.matdes.2015.07.120 ↗
42. Influence of microarc oxidation and hard anodizing on plain fatigue and fretting fatigue behaviour of Al–Mg–Si alloy10.1016/j.surfcoat.2007.06.058 ↗
43. UNI 7796-2010 · 2010
44. Effects of alloying elements in anodizing of aluminium10.1080/00202967.1997.11871137 ↗
45. Improved corrosion protection properties in anodic films type porous on 2024 T3 aluminium alloys obtained by pulse reverse plating10.1016/S1452-3981(23)12997-X ↗
46. Modification of nanostructured anodized aluminum coatings by pulse current mode10.1016/j.surfcoat.2015.08.004 ↗
47. Effect of pulse current parameters on the mechanical and corrosion properties of anodized nanoporous aluminum coatings10.1016/j.matchemphys.2016.09.006 ↗