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Process for preparing Ni-Co-Mo ternary alloy coating through electrodeposition
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A ni-co-mo, ternary alloy technology, applied in the field of electrodeposition to prepare Ni-Co-Mo ternary alloy coating, can solve the problems of low current efficiency, serious environmental pollution of workshop, harsh pH requirements of plating solution, etc. Good corrosion resistance and wear resistance, uniform and compact structure, good bonding effect
Inactive Publication Date: 2010-06-23
SHANGHAI UNIV
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However, ternary alloys are not widely used in production at present, and the main bottleneck lies in the complex composition of the plating solution, or the use of ammonia water as an auxiliary complexing agent causes serious environmental pollution in the workshop, or the pH of the plating solution is harsh, resulting in low current efficiency and affecting production efficiency.
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Embodiment 1
[0034] Embodiment 1: the composition of the electroplating solution used in the present embodiment is as follows:
[0041] The main process conditions of the electroplating process are as follows:
[0042] (1), the cathode, that is, the electroplating substrate is used as the cathode, and the electroplating substrate used is a copper-based alloy, that is, a Cu-Cr-Zr alloy, wherein the weight percentage becomes: Cu>98%, Cr 0.5~1.5 %, Zr 0.08~0.30%;
[0043] (2), the anode, the anode is S-nickel, that is, sulfur-containing active nickel cake;
[0044] (3), DC stabilized current, the current density during electroplating is 4A / dm 2 ;
[0045] (4), electroplating temperature is 55 ℃;
[0046] (5), the electroplating time is 5 to 6 hours; it is carried out under constant stir...
Embodiment 2
[0049] Embodiment 2: The technological process of this embodiment is basically the same as the above-mentioned embodiment 1, and the difference is that the following electroplating solution formula is adopted.
[0056] Embodiment 3: The technical process of this embodiment is basically the same as that of the above-mentioned embodiment 1, except that the following electroplating solution formula is adopted.
[0063] To the element composition analysis of embodiment gained coating, the chemical composition analysis of each coating of embodiment 1,2 and 3 sees the following table 1:
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Abstract
The invention relates to a process for preparing a Ni-Co-Mo ternary alloycoating through electrodeposition, which belongs to the technical field of metal deposition and electroplating processes. The invention provides a new electroplating solution formula and prepares the Ni-Co-Mo ternary alloycoating by utilizing a traditional common electroplating process. The formula of an electroplating solution used in the invention comprises the following components in weight contents: 30-60g / L of Ni, 1-10g / L of Co, 2-20g / L of sodiummolybdate, 20-50g / L of boracic acid and 80-200g / L of organic acid. The pH value of the electroplating solution is 1-5; the temperature of the electroplating solution is 45-55 DEG C. In the invention, an electroplating basal body, i.e. a cathode is a Cu-Cr-Zr alloy, an anode is S-nickel, i.e. a sulfur-contained activated nickel cake, a direct currentregulated power supply is adopted, the current density when in electroplating is 4A / dm2, and the electroplating time is 5-6 hours. The alloycoating prepared by the method of the invention has strong bonding force, higher rigidity and better corrosion resistance and abrasion resistance.
Description
technical field [0001] The invention relates to a process method for preparing Ni-Co-Mo ternary alloy coating by electrodeposition, which belongs to the technical field of metal deposition electroplating process. Background technique [0002] Since nickel, cobalt, and molybdenum are all transition metals, the reduction of hydrogen evolution overpotential exhibited after the formation of alloys has attracted extensive research, and the addition of molybdenum can refine the alloy grains and improve the corrosion resistance. However, ternary alloys are not widely used in production at present. The main bottleneck lies in the complex composition of the plating solution, or the use of ammonia water as an auxiliary complexing agent causes serious environmental pollution in the workshop, or the pH of the plating solution is harsh, resulting in low current efficiency and affecting production efficiency. Therefore, it is an urgent problem to study a process with simple plating soluti...
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