Alclad and unclad 2E12 aerospace aluminum alloy were treated by sulfuric acid anodic oxidation. The effects of alclad layer and anodizing time on the anodization behaviour and corrosion resistance of anodic oxide layer on 2E12 aluminum alloy were studied. Surface and cross-section morphology of anodic oxide films were observed by scanning electron microscopy. The electrochemical properties of anodic oxide films were analyzed by potentiodynamic polarization curve and electrochemical impedance spectroscopy. The results show that the protective anodic oxide layers are formed on alclad and unclad 2E12 aluminum alloy. The film thickness increases with anodizing time extending. The copper rich second phase particles lead to more cavity defects and even micro cracks on anodic oxide films of unclad 2E12 aluminum alloy. The anodic oxide films on alclad 2E12 aluminum alloy are thicker and have fewer cavity defects, resulting in better corrosion resistance. The films obtained after 30min and 45min anodic oxidation treatment exhibit lower corrosion current and higher impedance of the porous layer than other anodizing time.
陈高红, 胡远森, 于美, 刘建华, 李国爱. 包铝层和氧化时间对2E12铝合金硫酸阳极氧化及膜层性能的影响[J]. 材料工程, 2017, 45(7): 19-26.
Gao-hong CHEN, Yuan-sen HU, Mei YU, Jian-hua LIU, Guo-ai LI. Effects of Alclad Layer and Anodizing Time on Sulfuric Acid Anodizing and Film Properties of 2E12 Aluminum Alloy. Journal of Materials Engineering, 2017, 45(7): 19-26.
CURIONI M , SKELDON P , KOROLEVA E , et al. Role of tartaric acid on the anodizing and corrosion behavior of AA2024 T3 aluminum alloy[J]. Journal of the Electrochemical Society, 2009, 156 (4): C147- C153.
MOUTARLIER V , VIENNET R , ROLET J , et al. Power ultrasound irradiation during the alkaline etching process of the 2024 aluminum alloy[J]. Applied Surface Science, 2015, 355, 26- 31.
CHEN Z , REN J , ZHANG J , et al. Regulation mechanism of novel thermomechanical treatment for microstructure and properties of 2E12 aluminum alloy[J]. Journal of Materials Engineering & Performance, 2015, 44 (10): 2341- 2346.
YIN D , LIU H , CHEN Y , et al. Effect of grain size on fatigue-crack growth in 2524 aluminium alloy[J]. International Journal of Fatigue, 2016, 84, 9- 16.
CAPELOSSI V R , POELMAN M , RECLOUX I , et al. Corrosion protection of clad 2024 aluminum alloy anodized in tartaric-sulfuric acid bath and protected with hybrid sol-gel coating[J]. Electrochimica Acta, 2014, 124 (4): 69- 79.
YOGANANDAN G , BALARAJU J N , GRIPS V K W . The surface and electrochemical analysis of permanganate based conversion coating on alclad and unclad 2024 alloy[J]. Applied Surface Science, 2012, 258 (22): 8880- 8888.
SIEBER M , MORGENSTERN R , LAMPKE T . Anodic oxidation of the AlCu4Mg1 aluminium alloy with dynamic current control[J]. Surface & Coatings Technology, 2016, 302, 515- 522.
MA Y , ZHOU X , THOMPSON G E , et al. Anodic film formation on AA 2099-T8 aluminum alloy in tartaric-sulfuric acid[J]. Journal of the Electrochemical Society, 2011, 158 (2): C17- C22.
MINGO B , NĚMCOVÁ A , HAMAD D , et al. Efficiency of anodising of Al-Cu alloy in sulphuric acid at low potentials[J]. Transactions of the Institute of Metal Finishing, 2015, 93 (1): 18- 23.
KAO T T , CHANG Y C . Influence of anodization parameters on the volume expansion of anodic aluminum oxide formed in mixed solution of phosphoric and oxalic acids[J]. Applied Surface Science, 2014, 288 (1): 654- 659.
AERTS T , DIMOGERONTAKIS T , GRAEVE I D , et al. Influence of the anodizing temperature on the porosity and the mechanical properties of the porous anodic oxide film[J]. Surface & Coatings Technology, 2007, 201 (16): 7310- 7317.
YOGANANDAN G , BALARAJU J N , LOW C H C , et al. Electrochemical and long term corrosion behavior of Mn and Mo oxyanions sealed anodic oxide surface developed on aerospace aluminum alloy (AA2024)[J]. Surface & Coatings Technology, 2016, 288, 115- 125.
LIU J H , GAO Q N , LI Y D , et al. Oxidation behavior of 5A06 and 2A12 aluminum alloys in sulfuric-adipic acid and electrochemical property of anodic oxide film[J]. Journal of Beijing University of Aeronautics & Astronautics, 2015, 41 (5): 757- 763.
LI Y D , ZHANG Y , LI S M , et al. Influence of adipic acid on anodic film formation and corrosion resistance of 2024 aluminum alloy[J]. Transactions of Nonferrous Metals Society of China, 2016, 26 (2): 492- 500.
VEYSRENAUX D , CHAHBOUN N , ROCCA E . Anodizing of multiphase aluminium alloys in sulfuric acid: in-situ electrochemical behavior and oxide properties[J]. Electrochimica Acta, 2016, 211, 1056- 1065.
YAN J H , PENG C . Effect of sodium benzoate content on the morphology and properties of boric acid-sulfuric acid anodizing film[J]. Materials Protection, 2013, (10): 18- 19.
SAEEDIKHANI M , JAVIDI M , YAZDANI A . Anodizing of 2024-T3 aluminum alloy in sulfuric-boric-phosphoric acids and its corrosion behavior[J]. Transactions of Nonferrous Metals Society of China, 2013, 23 (9): 2551- 2559.