Method for improving corrosion resistance of hydrogen storage alloy by surface boronising method
A technology of hydrogen storage alloy and corrosion resistance, which is applied in the direction of chemical instruments and methods, hydrogen, non-metallic elements, etc., can solve the problems of hydrogen storage materials such as hydrogen storage capacity decline, strong corrosion, environmental hazards, etc., to increase capacity or Energy density, slowing down the speed of self-discharge, and increasing the effect of using time
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Embodiment 1
[0037] Embodiment 1: Preparation of hydrogen storage alloy powder
[0038] Table 1Mg a R b Ni c co d al e Composition examples of hydrogen storage alloys
[0039] Mg 2 Ni
Mg 2 Ni 0.5 co 0.5
Mg 2 Ni 0.5 co 0.25 al 0.25
Mg 2 Ni 0.25 co 0.25 Al 0.5
ZrNi 2
ZrNi 1.5 co 0.5
ZrNi 1.5 co 0.25 Al 0.25
ZrNi 1.25 co 0.25 Al 0.5
CaNi 5
CaNi 4.5 co 0.5
CaNi 4.5 co 0.25 al 0.25
CaNi 4.25 co 0.25 al 0.5
LaNi 5
LaNi 4.5 co 0.5
LaNi 4.5 co 0.25 Al 0.25
LaNi 4.25 co 0.25 Al 0.5
MlNi 5
MlNi 4.5 co 0.5
MlNi 4.5 co 0.25 Al 0.25
MlNi 4.25 co 0.25 Al 0.5
CeNi 5
CeNi 4.5 co 0.5
CeNi 4.5 co 0.25 Al 0.25
CeNi 4.25 co 0.25 al 0.5
MmNi 5
MmNi 4.5 co 0.5
MmNi 4.5 co 0.25 Al 0.25
MmNi 4.25 co 0.25 Al 0.5
Mg 1.6 La 0.4 Ni
Mg 1...
Embodiment 2
[0042] Embodiment 2: Hydrogen storage alloy boronizing treatment
[0043] Select some alloys in Example 1 for boronizing treatment, take 100 grams of hydrogen storage alloy powder, the particle size range is 200 mesh to 400 mesh, mechanically mix with boron supply agent or boron supply agent and activator, and place in argon-protected In the tube furnace, control the heating rate of 1-10°C / min, heat to 500-800°C, and calcine for 1-12 hours. The boronizing treatment process conditions are listed in Table 2.
[0044] Table 2 Hydrogen storage alloy boronizing process conditions
[0045] Alloy (g)
Embodiment 3
[0046] Embodiment 3: Activation treatment after boronizing treatment of hydrogen storage alloy
[0047] At room temperature, put 10 grams of the above-mentioned surface boronized hydrogen storage material powder in 200 milliliters with a concentration of 0.01 to 0.5 M L -1 Soak in hydrochloric acid, oxalic acid or glacial acetic acid solution at room temperature for 0.5~5h, or place in 200ml concentration of 2~6M L -1 Soak in NaOH or KOH solution at 50-90°C for 0.5-5h, take it out by filtration, wash and filter with deionized water, and dry in vacuum at 70-90°C for 6-12h.
[0048] Table 3 Activation treatment process conditions of hydrogen storage alloy after boronizing treatment
[0049]
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