,
radii shoes sale
6063 alkaline nickel plating Corrosion Resistance
3 alloy surface before and after electroless nickel Figure 2.3 XRD diffraction analysis of the electrochemical test results before and after electroless nickel alloy surface in W (NaOH) = 4% NaOH solution in the anodic polarization curve shown in Figure 4. Can be drawn from the figure, the corrosion potential of aluminum is about a 1.45V, while the nickel plating treatment, the corrosion potential is ~ 0.5v. The resulting nickel-plated aluminum surface greatly improved the corrosion potential. Chemical corrosion potential of nickel-plated to improve that to get out the thermodynamic stability of the warm mixed ember Light Alloy Fabrication Technology 2009, Vo1.37, 5to3 significantly increase will help improve the corrosion resistance of aluminum alloy. Comparison Chart of electroless nickel alloy surface before and after the anodic polarization curve, can be found, chemical nickel plated aluminum alloy after anodic polarization corrosion current density of less than 0.1mA/cd areas of potential range to 900mV, while the matrix in W (NaOH) = 4% NaOH solution in anodic corrosion current density of the area is not less than 0.1mA/cm2 potential range, is rapid activation of the anode corrosion, corrosion potential,
air jordan high heels, once into the anode zone, the corrosion current density sharply limiting current density increased, indicating that aluminum is extremely corrosive alkali. Z jump layer does not damage the case, a large number of precipitation gas sample surface, indicating that nickel-plated aluminum alloy surface to oxygen evolution overpotential. Aluminum alloy surface to oxygen evolution overpotential without damage to the phenomenon that the coating in the W (NaOH) = 4% NaOH solution in the excellent corrosion resistance,
mulberry bags uk, basically does not corrode. 2.4 full-erosion corrosion weight loss test network 5 is a nickel-plated aluminum alloy surface chemistry before and after W (NaOH) = 4% NaOH solution in the erosion corrosion test in all the corrosion weight loss curves obtained. It can be seen from the figure, the aluminum alloy in the W (NaOH) = 4% of the NaOH solution rapidly dissolve corrosion, dissolved after the 8h, and chemically nickel plated aluminum corrosion rate is very slow,
mulberry outlet, 24h after the corrosion weight loss of only 0.0005mg/cm2, and observe the surface of the specimen did not see any signs of corrosion. Nickel-plated aluminum front and rear in Sapporo J (NaOH) = 4% NaOH solution in the corrosion weight loss difference of nearly six orders of magnitude,
herve leger skirts, indicating that the electroless nickel alloy treated in W (NaOH) = 4% NaOH solution does not occur in the basic corrosive, chemically nickel-plated aluminum alkali corrosion has been significantly improved. Division 1 Hau nonyl} {Zhuo l1 <-based small-minded Figure 5 before and after electroless nickel alloy surface in W (NaOH) = 4% NaOH solution in the whole erosion corrosion test 3 Conclusions (1) aluminum plating the surface of alkaline nickel, you can get a layer of dense amorphous high phosphorus nickel layer. (2) aluminum alloy in the W (NaOH) = 4% NaOH solution in the range of anodic polarization curves without passivation, and chemical nickel plating treatment, the anodic polarization curve there is a clear passivation range and passivation potential range of 900mV, and the potential to achieve at the overpotential of oxygen evolution is still not damaged the coating, indicating that the corrosion resistance improved significantly. (3) aluminum alloy (Na0H) = 4% NaOH solution in place uniform corrosion, and chemical nickel plating process after the basic non-corrosive, it can significantly improve the alkali resistance. References: [1] Pan Fu-sheng, Zhang Ding non. Aluminum and application [M]. Beijing: Chemical _T -, _lk Press, 2006. [2] Geng Haoran, Teng new camp, Wang Yan, et al. Cast aluminum, magnesium alloy [M]. Beijing: Chemical Industry Press, 2007. [3] DONALDRASKEIAND, PRADEEPPPul6. TheScienceandEngineeringofMaterials [M]. Beijing: TsinghtlaUni · vcrsityPress, 2005. [4] Wen-Bin Hu, Liu Lei, WU Yating. Hard substrate electroless nickel plating technology [M]. Beijing: Chemical _T-. , 3k Press, 2003. [5] Guang-Hui Hu, Hui-Huang Wu, Yang Fang-Zu. Corrosion resistance of Ni-P coating with phosphorus content and its relationship [J]. Journal of Physical Chemistry, 2005,21 (11): l299-1302. [6] Sun J, Fan Meng. AZ91D magnesium alloy surface coating of electroless nickel phosphorus study [J]. Changchun University of Technology (Natural Science), 2006,27 (3): 211 ~ 2I3.
More articles related to topics：
######## oakley sunglasses eqf zdp novx atu
replica oakley sunglasses jrf duz etjc uwd
herve leger skirts nlz yvu lysz yrr
Linear Mode
