Common Solutions To Loosen Corroded Bolts & Fasteners

Loosen Corroded Bolts And Fasteners

You can try one of these solutions if you have corroded fasteners in your home or business. First, we’ll discuss the advantages of each method. Then, to use these solutions, ensure the fastener is rusted, and then read on how to loosen it.

Penetrating Lubricants

Penetrating lubricants are chemicals that work by offering temporary or long-lasting lubrication. They also work to loosen rusted or frozen fasteners or fixtures. Penetrating oils are also often used as cleaning agents to remove rust, grease, and adhesives. They are effective for both static and dynamic friction.

The use of penetrating lubricants is every day for corroded fasteners and bolts. They can also spray to loosen bolts from metal objects. By dissolving moisture, penetrating oils can remove stubborn rust from metal parts. In addition, because of their low viscosity, penetrating oils can be used on metal components without damaging their molecular structure.

Good penetrating oil can help you remove rusted fasteners without using a wrench. Some of the best penetrating oils are available at a local hardware store or online. Aerofoil, for instance, is the best penetrating oil available on the market. It’s a bit more expensive than other penetrating oils, but it’s worth the money if you try to remove stubborn fasteners.

Rust Penetrants

Various household rust-removal products can be used to loosen corroded bolts. Some home-brew rust-removal solutions do not contain all the ingredients listed above.  Homemade rust-penetrants don’t work as well as those formulated to remove rust.

You can try various homemade rust-penetrants instead of purchasing a rust-penetrant. Lemon juice, cola, and hydrogen peroxide can substitute for penetrating oil. Be sure to allow the solution to stay on the corroded bolt or fastener for 15 minutes before loosening it. Be sure not to strip the threads with your screwdriver, as this may result in a stripping screwdriver.

If the rust-penetrants don’t work, the next option is to cut the fastener and discard it. Unfortunately, it renders the fastener unusable. If you’re lucky, you can loosen the bolt without destroying it. If not a viable option, you can try tapping the head of the bolt with a hammer to loosen it.

Hollow Metal Bars

When fasteners become rusted, they lose tensile strength and clamping force, rendering them useless for replacement. Small pins cannot be saved. A piece of steel wool or fine sandpaper will work. The solution involves using a high-quality lubricant.

Before turning rusted bolts, you should remove any rust and corrosion from the bolt’s head. A sturdy wire brush can help you remove any accumulated debris over time. Use it to clean the head of the bolt and the threading on the bolt’s bottom. This step is crucial because the rusty bolt can break free of its grip on the bolt’s head. To increase the chances of success, you can use penetrating oil to loosen corroded fasteners.


The process of heat-torching a bolt or fastener will loosen it. The heat will expand the metal of the bolt or nut and the material around the fastener’s hole. The expansion will cause the part to turn. The nut should be unthreaded, and the threads cleaned before removing the bolt. However, the process may take some time, so it is essential to be patient and try it in small sections.

An excellent method to loosen stubborn bolts is to use dry ice. Dry ice will shrink the size of a bolt, disrupting its rusty bond. When applying heat to a fastener, you should use a vise grip to help transfer heat. This way, you can use more force to break the fastener. If this method does not work, you can use heat to break the fastener.

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