Screws are rusty, how to remove？

Knock

Screws with serious corrosion should not be screwed with a wrench to prevent them from slipping, breaking the screw or breaking the wrench. At this time, you can use a hammer to gently knock the handle of the wrench, and the rusted screw will be loosened so that it can be unscrewed.

Drip

If the screw is not seriously rusted, you can try dripping first, and if you still can't unscrew it, you can drip a little oil or vegetable oil along the gap of the screw and nut, and with the steel wrench and wrench, you can often screw it down easily. (Oil is not effective for screws with serious rust and will affect disassembly)

Burning

Some screws are seriously rusted and can be attacked by fire. Steps:Use gas welding flame to fully grill the screws and nuts, and then to burn the red screw drops of machine oil or sewing machine oil.Screw heat expansion, squeeze the rust between the screw and the nut to increase the gap, after the drop of oil screw cold quickly shrink, further increase the gap between the screw and the nut, the oil flow into the screw can be unscrewed. Note that there are plastic parts near the screw caution with this method, while the burned screw should not be used.

Punch

Some screws on the top of a word or cross mouth deformation,can not be unloaded with a screwdriver, wrench, wire cutters, can be used to impact method. Steps:First, use a hammer and a flat screwdriver to impact a V-shaped groove on the top vertical surface of the screw.Then adjust the angle of the flat screwdriver and impact along the direction of thread screwing.After the screw is loosened,the screw can be screwed out with steel wire pliers.

Weld

After the screw is unscrewed, it is best not to use the method of drilling through the electric drill, otherwise the drill bit will slide to drill bad housing, or expand the silk hole, need to re-tapping. The better way is:In the broken screw with welding on an iron bar or flat iron, flat iron cross-section of the screw diameter.Flat iron welded firmly, quickly to the welded place to drip oil, so that the oil infiltration nut.After cooling, use a small hammer to knock back and forth along the horizontal direction of the other end of the flat iron, the screw is loose, rotate the flat iron, that can spin out the broken nail.

Soak

For plastic screws or screws fastening plastic parts, the above-mentioned methods can not be used, at this time, the screw can be put into the water or oil soaked for a number of hours, you can easily disassemble.