Studies on the electrochemical behaviour of Al-Ni alloys in alkaline solutions

被引：0
|
作者：
Assaf, FH [1 ]
Abou-Krisha, MM [1 ]
Zaky, AM [1 ]
El-Sheikh, FM [1 ]
Maghrapy, E [1 ]
机构：
[1] S Valley Univ Qena, Fac Sci, Dept Chem, Qena, Egypt
来源：
AFINIDAD | 2003年 / 60卷 / 503期
关键词：
aluminum; nickel; potentiodynamic; potentiostatic; corrosion; sodium hydroxide;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The electrochemical behaviour of Al and Al-Ni alloy of different Ni % content below the eutectic, the eutectic and beyond the eutectic composition were investigated by potentiodynamic anodic polarization and potentiostatic current-time transient techniques in NaOH solutions complemented by metallugraphic examination. The anodic polarization behaviour of both Al and Ni was introduced for comparison. The results of anodic passivation parameters showed that the alloy of the eutectic composition has the highest resistivity against corrosion in all studied solutions. This may be attributed to the decrease of the anodic dissolution rates with increasing surface area ratios of the eutectic composition in the alloy. The main anodic dissolution reaction in all alloys is identified as a selective dissolution of the Al, a-phase, from the Al(alpha) + NiAL(beta) eutectic composition. The corrosion behaviour of the alloys below the eutectic composition is attributed to the bifunctional effect of Ni2+ cations in the solution, which either promotes or inhibits the dissolution of the alloy, depending on the concentration of Ni2+ cations dissolved in the solution.
引用
收藏
页码：100 / 108
页数：9
相关论文
共 50 条
  • [1] Electrochemical behaviour of Ni-Co amorphous alloys in alkaline solutions
    Barbosa M.R.
    Gassa L.M.
    Ruiz E.R.
    [J]. Journal of Solid State Electrochemistry, 2001, 6 (1) : 1 - 7
  • [2] Electrochemical behaviour of Ni-Co amorphous alloys in alkaline solutions
    Barbosa, MR
    Gassa, LM
    Ruiz, ER
    [J]. JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 2001, 6 (01) : 1 - 7
  • [3] Effect of ultrasonic treatment on the mechanical behaviour of Al-Ni alloys
    Srivastava, Neeraj
    Chaudhari, G. P.
    [J]. MATERIALS SCIENCE AND TECHNOLOGY, 2019, 35 (10) : 1239 - 1247
  • [4] Thermodynamics of liquid Al-Ni alloys
    Grigorovitch, KV
    Krylov, AS
    [J]. THERMOCHIMICA ACTA, 1998, 314 (1-2) : 255 - 263
  • [5] Electrochemical corrosion characterization of Al-Ni alloys in a dilute sodium chloride solution
    Osorio, Wislei R.
    Peixoto, Leandro C.
    Cante, Manuel V.
    Garcia, Amauri
    [J]. ELECTROCHIMICA ACTA, 2010, 55 (13) : 4078 - 4085
  • [6] Fabrication of Al-Ni Alloys for Fast Hydrogen Production from Hydrolysis in Alkaline Water
    Kwon, JaeYoung
    Eom, KwangSup
    Kim, MinJoong
    Toor, Ihsan
    Oh, SeKwon
    Kwon, HyukSang
    [J]. MATERIALS, 2023, 16 (23)
  • [7] In situ XRD studies on Al-Ni and Al-Ni-Sr alloys prepared by rapid solidification
    Saksl, K.
    Vojtech, D.
    Durisin, J.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 464 (1-2) : 95 - 100
  • [8] Surface Tension and Density of Al-Ni Alloys
    Giuranno, Donatella
    Tuissi, Ausonio
    Novakovic, Rada
    Ricci, Enrica
    [J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2010, 55 (09): : 3024 - 3028
  • [9] THERMODYNAMIC PROPERTIES OF AL-NI HARD ALLOYS
    ESKOV, VM
    SAMOKHVAL, VV
    VECHER, AA
    [J]. RUSSIAN METALLURGY, 1974, (02): : 118 - 119
  • [10] MECHANICAL PROPERTIES OF Al-Ni CAST ALLOYS
    Koc, Funda Gul
    Karakulak, Erdem
    Yamanoglu, Ridvan
    Zeren, Muzaffer
    [J]. METAL 2014: 23RD INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS, 2014, : 1283 - 1287
12345