1. Hit hard with a hammer

Screw the screw with a wrench, and then hit the knob of the wrench with a hammer, knock twice with high frequency, and the rusty part inside will become loose due to knocking.Screw the word again more easily, or immediately hit the nut, the periphery of a few times, also can let the nut and screw between cause loose, more easily unscrew.

2. Rust remover method

Spray the rust remover on the rusty screw immediately, and when the remover penetrates into the screw, it will open the screw easily.

3. Cola method

Immediately rub the coke on the rusty screw, after a period of time, you will find that the screw is very easy to unscrew, because coke contains carbonic acid, the composition of the rust is a compound, the two produce exothermic reaction, you can remove the rust.Dispensing screw

4. Roast over fire

If screw erosion in severe cases, able to use fire, use gas cutting air oxidation flame barbecue will screw and nut, then drop a drop of oil to burn the red screw, its basic principle is the heat from the cold, heat to make the screw aspect, then make its rapid cooling, can increase the screw and nut in the middle of the gap, just remove the screw.