Anti-lockup coating solution and preparation method, metal threaded connecting piece and preparation method

The invention relates to an anti-lockup coating solution and a preparation method of the anti-lockup coating solution. Common sea shells or fresh water shells are selected and used to be main raw materials. The preparation method comprises the specific steps of dissolving, dispersing, centrifugalizing and PH value regulating. The invention further relates to a metal threaded connecting piece with an anti-lockup coating and a preparation method of the metal threaded connecting piece. The anti-lockup coating solution serves as a reaction solution and coating and drying are conducted on the surface of the metal threaded connecting piece by using electrochemical deposition. Natural shells are taken as the raw materials, the anti-lockup coating solution and the preparation method are economical and environmentally friendly, the prepared coating is acid and alkali resistant and high-temperature corrosion resistant, the stability is high, and the anti-lockup effect is good, the frictional coefficient of the surface