How can I unscrew a heavily rusted screw quickly?

1. Shock: For rusty screws, do not use a wrench to screw hard, in case you slip the six edges and corners of the screw, break the screw or break the wrench. At this time, you can use a hammer to gently shake the handle of the wrench, and the screws that are generally rusted can be vibrated and unscrewed.

2. Knock: Use the edge of the square-top hammer to knock the rusted nut, which is easy to loosen the nut. For example, the nuts that fix the bolts at both ends of the pedals of a bicycle can be struck with force according to the thickness of the pedal and the metal structure.

The nut at the cast iron can be used with a slightly larger force, and the plastic part should be gently beaten. If that doesn't work, you can easily remove the nut by tapping it in a circular motion with a hammer.

3. Burning: Some screws are very seriously corroded, and the above methods still do not work, so you can use "fire attack". Use a gas welding oxidation flame to grill the screws and nuts thoroughly, and then drip a trace of oil on the red-hot screws.

The purpose of heating the screw is to make the screw expand when heated. The purpose of dripping oil is to make the screw shrink quickly when cold, increase the gap between the screw and the nut, and the nut can be unscrewed after the oil flows in. However, if there are plastic devices nearby, use this method with caution.

4 punch: The top of the screw of some devices is corroded and out of shape, and cannot be removed with a wrench or wire cutter, and the impact method can be used. First, use a hammer and a top-level flat cone to impact a V-shaped groove in the vertical direction of the top of the screw, and then, adjust the angle of the punching cone and impact it in the direction of the screw, see Figure 2.

Once loosened, the screws can be screwed out with a wire cutter. When the "one" or "ten" screw sliding, this method can also be used to screw out the screw in combination with the wire cutter.

5. Soldering: When disassembling the device, it is not uncommon to unscrew the screws. For the screws with broken tops, electric drills are generally not used, because the slightest carelessness will drill the wire holes.

It is better to weld a long piece of iron to the broken wire with electric welding. The cross-section of the iron block is determined by the diameter of the screw. After the iron is firmly welded, oil is quickly dripped into the solder joint to soak the nut.

After cooling, use a small iron cone to knock the other end of the iron back and forth in the horizontal direction, and when the screw is loose, rotate the iron to unscrew out the broken wire.

Knock, drop, fire, punch.

Method 1: Knock. Screws with severe rust should not be hard screwed with a wrench to prevent screwing slippery edges and corners, breaking screws or breaking the wrench. At this point, the handle of the wrench can be gently tapped with a hammer, and the rusted screws will often come loose so that they can be unscrewed.

Method 2: Drops. If you still can't unscrew it, you can drip a little oil or vegetable oil along the gap between the screws and nuts, and with wire cutters and wrenches, it can often be easily unscrewed. (Oil has no effect on rusty screws and will affect disassembly).

Method 3: Burn some screws with serious rust, and fire attack can be used. Steps:

1) Use the gas welding flame to grill the screws and nuts thoroughly, 2) Then drip engine oil or sewing machine oil on the red-hot screws.

3) The screw expands by heating, squeezes the rust between the screw and the nut, increases the gap, and the screw shrinks rapidly when cold after dripping oil, further increasing the gap between the screw and the nut, and the screw can be unscrewed after the oil flows in. Note that screws with plastic parts nearby should be used with caution, and burned screws should not be used again.

Method 4: Rush. The slotted or cross mouth on the top of some screws is deformed and cannot be removed with a screwdriver, wrench, or wire cutter, and the impact method can be used. Steps:

1) First, use a hammer and flat-neck screwdriver to impact a V-shaped groove on the vertical surface of the top of the screw;

2) Then adjust the angle of the flat-blade screwdriver and impact it in the direction of the thread unscrewing;

3) After the screws are washed loose, the screws can be screwed out with wire cutters.

The first is to soak in oil, and then slowly twist after soaking, if it doesn't work;

Second, use fire to burn, use the method of heat expansion and cold contraction, make it separate, and then screw (note that heating can only heat one of them, such as screws, or nuts; Beware of burns if it still doesn't work;

The third, and last, nirvana, take an electric grinding wheel, or a hacksaw

You can add some oil or something, and after 10 minutes, you can easily unscrew it.

The easiest way

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Don't screw rusty screws hard, learn a trick to easily unscrew them, and solve them easily.

Dripping (better yet) gasoline or kerosene on rusty screws and screwing them after a while is often effective. When twisting, you can twist a little in the direction of loosening and then twist a little in the direction of tightening, and it is easy to twist out when the rusty screws are vibrated with a mallet.

2 Carefully drill holes in the screws with a drill bit that is a little smaller than the rusty screws, and then clean the remaining screws in the screw holes. If it still doesn't work, you can only use a drill bit that is one level larger than the size of the rusty screw to drill the rusty screw out, and then use a wire drill one level larger than the size of the rusty screw to drill out the screw teeth and match the new screws.

Soak it in diesel.

There are many ways to deal with rusty screws, and diesel bubbles are not as effective as kerosene. Kerosene is not as effective as a special bolt loosening agent, and the best way to do this is to bake it red over a fire and soak it in diesel or engine oil, so that any rusty screws can be easily unscrewed.

After spraying the thread loosening agent, it can be unscrewed off after a while.

Rusty screws can be struck repeatedly with a wrench or other tool to gradually loosen the screws, and then unscrew them with a wrench or screwdriver. You can also pour the cola on top of the rusty screw and wait a few minutes, or pour the rust remover over the screw and the rust will gradually dissolve, after which it can be easily unscrewed with a wrench or screw.

If the screws are heavily rusted, you can first try to tap the screws with a wrench or other tools, and the screws will gradually loosen under normal circumstances, and then you can easily unscrew the screws with a wrench or screwdriver.

Heavily rusted screws can also be treated with Coke, pour the Coke on top of the screws and wait for a few minutes, Coke will remove the rust from the screws, at which point you can also use a wrench or screwdriver to unscrew the screws.

Rust remover is a chemical reagent dedicated to removing rust, after spraying the rust remover on the rusty screw, the rust remover will gradually penetrate into the screw, after a period of time, the rust will fall off, at this time, you can also try to use a wrench or screw key to unscrew the screw.

Knock, fire the screws, apply cola, apply detergent. Tapping: Tighten the screw with a wrench first, and then use a hammer to quickly tap the handle position of the wrench, after a few minutes of knocking, the rusty part will be loosened due to the knocking, and it can be easily unscrewed.

How to unscrew heavily rusty screws:

1. Knocking: first use the wrench to screw the screw, and then use the hammer to quickly knock the handle position of the wrench, after a few minutes of knocking, the rusty part will be loose due to the knocking, and it can be easily unscrewed.

2. Fire screws: Clamp the screws with pliers, then burn them with fire, burn them for a few minutes, see the screws burn red, and then drop a few drops of cooking oil on the screws, and use the thermal expansion and cold contraction principle of the metal itself to unscrew the screws.

4. Apply detergent: Prepare a small container, pour water, add 2 caps of alcohol, white vinegar and dish soap, stir evenly and pour it on the screw, it can also react with rust, and take out a wrench to unscrew the screw in a few minutes.

Do not use a wrench to tighten heavily corroded screws. Otherwise, it is likely to cause corner slippage and screw breakage. We can first hit the handle of the wrench with a hammer. At this point, the resonance will loosen the corroded screw.

If this method doesn't work, the hardware store also offers a dedicated screw tensioner that you can spray on a few times and you'll find that it's easy to unscrew.

What if I don't want to buy a loosening agent? You can pour the remaining coke over the rusty screws and try again after a few minutes. At this point, the screw is easy to unscrew because the coke contains carbonic acid, which will chemically react with the rust to remove the rust.

If you have a lubricant such as organic oil or kerosene at home, you can also try it directly on the screws, but remember to wear gloves when operating.

1.Loosen the rusty part with a hammer and use a screwdriver to tighten it.

2.When cola is added, the cola bypass will break down the rust when it rusts, and if there is no rust, the screws are easy to tighten.

3.In the case of slipping or breaking, a smaller drill bit can be used for drilling, or the screws can be sawed off directly.

4.If the screw hole is damaged, Calla can repair it to its original position using a wire sleeve. If that doesn't work, just use a hacksaw to see the screws once. Finally, re-drill with an electric drill.

5.Using a rust remover, apply the rust remover to the rusty screws and wait until the rust is gone, then tighten it with a screwdriver.

1.Use a suspended grinder to cut it into the nut to cut a deep cut of a word, and then change the cross shape to a grub screw.

2.Fill the middle of the circle with tin and wring it out with needle-nose pliers.

3.Put some toilet paper on the lid to increase friction. To do this, clamp the screw riser with pliers and unscrew it.

Rusty screws are quickly removed: heat treatment, carbonic acid treatment, violent removal.

1. Heat treatment

Rusty screws can be quickly removed by heating the method. First, turn on the gas welding gun and bake the rusty screws until the screws appear red, then drip oil upwards so that the oil flows into the threads inside the screws, and can be easily unscrewed after cooling.

2. Carbonic acid treatment

Rusty screws can be removed by carbonic acid treatment. Carbonic acid can react with rust stains, thereby decomposing rust stains and reducing the firmness of the screws.

3. Violent unloading

If you don't have a gas welding gun or carbonated drink, you can use violence to remove the rusty screws. First, use a hammer to hit the rusty screw to loosen the inside, and then use the corresponding screwdriver, fix it at the bayonet of the screw, and tighten it firmly to unscrew the screw.

Causes of rusty screws

Stainless steel is just a general term for materials, stainless steel materials are usually divided into: 201 material, 304 material, 316 these three materials, 316 material is the most expensive and the most corrosion-resistant, many ordinary stainless steel products basically use 201 material.

Sometimes the stainless steel products we buy at home, after using them for a period of time, there will be some rust spots on them, and many people will think that they are not buying fake stainless steel, but in fact, what they bought is not fake.

The reason why stainless steel rust will rust is because the surface of stainless steel is attached to the dust particles of other metal elements, and in a humid environment, a chemical reaction occurs between the metal particles and stainless steel, which causes stainless steel to rust.

Another reason is that the surface of stainless steel cannot be removed in time, acidic, alkaline, salt and other substances, caused by local corrosion, resulting in rust. This is the basic reason why stainless steel screws rust.