Oil casing pipe joint anti-thread-gluing coating and preparation method thereof
A oil casing, anti-sticking technology, applied in the direction of pipes/pipe joints/fittings, coatings, anti-corrosion coatings, etc., can solve problems such as heavy metal powder pollution
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Embodiment 1
[0051] Coating composition (weight percent)
[0052] 49.8% polyamideimide, 10% polytetrafluoroethylene, 30% modified molybdenum disulfide, 5% modified titanium dioxide, 5% calcium stearate, 0.1% leveling agent, 0.1% wetting agent, mixed solvent The dosage is 3 times the mass of the above components.
[0053] Coating process: the pressure of the spray gun is 0.25MPa, and the temperature is kept at 280°C for 0.3 hours in a drying oven.
[0054] Results: After the above treatment, the bonding strength between the coating and the oil pipe joint of P110 steel grade is grade 1; there is no sticking phenomenon in the make-up and breakout 11 times; there is no rust point in the neutral salt spray test for 100 hours.
Embodiment 2
[0056] 30.89% polyamideimide, 7% polytetrafluoroethylene, 49% modified molybdenum disulfide, 10% modified titanium dioxide, 3% calcium stearate, 0.01% leveling agent, 0.1% wetting agent, mixed solvent The dosage is 4 times the mass of the above components.
[0057] Coating process: the pressure of the spray gun is 0.25MPa, and the temperature is kept at 280°C for 0.1 hour in a drying oven.
[0058] Results: After the above treatment, the bonding strength between the coating and the oil pipe joint of P110 steel grade is grade 1; there is no sticking phenomenon in the make-up and breakout 11 times; there is no rust point in the neutral salt spray test for 100 hours.
Embodiment 3
[0060] 57.89% polyamideimide, 4% polytetrafluoroethylene, 32% modified molybdenum disulfide, 5% modified titanium dioxide, 1% calcium stearate, 0.1% leveling agent, 0.01% wetting agent, mixed solvent The dosage is 3.5 times the mass of the above components.
[0061] Coating process: the pressure of the spray gun is 0.25MPa, and the temperature is kept at 250°C for 0.1 hour in a drying oven.
[0062] Results: After the above treatment, the bonding strength between the coating and the oil pipe joint of BG110SS steel grade was grade 1; there was no sticking phenomenon in the make-up and breakout 11 times; there was no rust point in the neutral salt spray test for 100 hours.
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