Production method of protection film for nuclear fuel rod zirconium alloy cladding laser welded joint
A laser welding and nuclear fuel rod technology, applied in electrolytic coatings, nuclear power generation, surface reaction electrolytic coatings, etc., can solve problems such as preferential corrosion of zirconium alloy welded joints, prolong service life, improve corrosion resistance, and prevent preferential corrosion. Effect
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Embodiment 1
[0019] The sample is a Zr-1Nb alloy laser welding sample.
[0020] Pretreatment: Laser welding samples of zirconium alloy with 80 # -2000 # After the sandpaper is polished step by step, it is placed in acetone and ultrasonically cleaned to remove oil.
[0021] Configuration of electrolyte: The electrolyte is an aqueous solution composed of sodium phosphate, potassium hydroxide, and glycerin, and the composition is 2g / L sodium phosphate, 3g / L potassium hydroxide, and 2g / L glycerin.
[0022] The Zr-1Nb alloy laser welding sample was put into the prepared electrolyte, the laser welding sample was used as the anode, the stainless steel electrolytic cell was used as the cathode, the positive voltage was +360V, the negative voltage was -150V, and the micro-arc oxidation treatment was 30min.
[0023] The Zr-1Nb alloy welded specimens after micro-arc oxidation were immersed in pure water at 95°C for 6 minutes, sealed, and then dried with hot air at 45°C.
[0024] After the above steps, the zirc...
Embodiment 2
[0026] The surface pretreatment of the Zr-1Nb sample was carried out in the same method as in Example 1, the electrolyte was prepared, and the zirconium alloy laser welding sample was subjected to micro-arc oxidation treatment, and finally the sealing treatment was carried out.
[0027] Among them, the electrolyte uses: 6g / L sodium phosphate, 1g / L potassium hydroxide, 2g / L glycerin.
[0028] The Zr-1Nb alloy laser welding sample was put into the prepared electrolyte, the laser welding sample was used as the anode, the stainless steel electrolytic cell was used as the cathode, the positive voltage was +340V, the negative voltage was -150V, and the treatment time was 30 minutes.
[0029] Finally, a laser welding sample M2 of zirconium alloy treated by micro-arc oxidation is obtained.
Embodiment 3
[0031] With reference to the method of Example 1, the Zr-1Nb sample was subjected to surface pretreatment, electrolyte was prepared, and the zirconium alloy laser welded sample was subjected to micro-arc oxidation treatment, and finally the sealing treatment was performed.
[0032] Configuration electrolyte: 4g / L sodium phosphate, 3g / L potassium hydroxide, 2g / L glycerin.
[0033] The Zr-1Nb alloy laser welding sample was put into the prepared electrolyte, the laser welding sample was used as the anode, and the stainless steel electrolytic cell was used as the cathode. The positive voltage was +400V, the negative voltage was -100V, and the treatment time was 30min.
[0034] Finally, a laser welding sample M3 of the zirconium alloy treated by micro-arc oxidation is obtained.
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