Method for preparing high-bonding strength catbon steel based Al2O3 ceramic coating with colloidal sol-gel rubber
A combination of strength and ceramic coating technology, applied in coating, metal material coating process, superimposed layer plating, etc., can solve the problems of high cost, expensive laser processing equipment, and high requirements for ceramic oxide types, etc., to achieve The effect of good compactness, uniform composition and simple process
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[0018] Example 1:
[0019] Preparation of Al2O3 ceramic coating with good film-base bond strength on the surface of No. 20 steel. Process:
[0020] Electroless Ni-P alloy intermediate transition layer process:
[0021] Test process: The sample is ground, polished, cleaned and other pre-plating pretreatment → electroless nickel plating → hot water washing → water washing → drying under vacuum at 180 ° C for 1 hour.
[0022] Bath composition: nickel sulfate: 25g / L; sodium hypophosphite: 23g / L; sodium citrate: 8g / L and sodium acetate: 15g / L.
[0023] Process conditions: temperature: 85℃; pH value of plating solution: 4.0; plating time: 1-2h;
[0024] Coating Al on the Surface of Electroless Ni-P Coating by Sol-Gel Method 2 O 3 Ceramic coating process:
[0025] Select aluminum isopropoxide as a precursor, use secondary deionized water as a solvent, and use nitric acid as a peptizer in a molar ratio of 1:80:0.1, first mix the finely ground aluminum isopropoxide and deionized w...
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[0029] Example 2:
[0030] Preparation of Al2O3 ceramic coating with good film-base bond strength on the surface of 45# steel:
[0031] Electroless Ni-P alloy intermediate transition layer process:
[0032] Test process: clean the surface of the sample for pretreatment → electroless nickel plating → cleaning → drying under vacuum at 190 °C for 1 hour.
[0033] Bath composition: nickel sulfate: 26g / L; sodium hypophosphite: 24g / L; sodium citrate: 10g / L and sodium acetate: 16g / L.
[0034] Process conditions: temperature: 87°C; pH value of plating solution: 5.0; plating time: 1.5h.
[0035] Coating Al on the Surface of Electroless Ni-P Coating by Sol-Gel Method 2 O 3 Ceramic coating process:
[0036] Select aluminum isopropoxide as a precursor, use secondary deionized water as a solvent, and use nitric acid as a peptizer in a molar ratio of 1: 100: 0.2, first mix the finely ground aluminum isopropoxide and deionized water, After vigorously stirring at a water bath temperatur...
Example Embodiment
[0040] Example 3:
[0041] Preparation of Al with good film-base bond strength on the surface of 60# steel 2 O 3 Ceramic coating:
[0042] Electroless Ni-P alloy intermediate transition layer process:
[0043] Test process: clean and pretreat the surface of the sample → electroless nickel plating → cleaning → drying under vacuum at 200°C for 1 hour.
[0044] Bath composition: nickel sulfate: 28g / L; sodium hypophosphite: 25g / L; sodium citrate: 12g / L and sodium acetate: 18g / L.
[0045] Process conditions: temperature: 90°C; pH value of plating solution: 6.0; plating time: 1.5h.
[0046] Coating Al on the Surface of Electroless Ni-P Coating by Sol-Gel Method 2 O 3 Ceramic coating process:
[0047] Select aluminum isopropoxide as a precursor, use secondary deionized water as a solvent, and nitric acid as a peptizer in a molar ratio of 1: 120: 0.3, first mix the finely ground aluminum isopropoxide and deionized water, After vigorously stirring at a water bath temperature of...
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