The process of blackening steel involves the application of a coat on the metal to darken it. This is often done by heating and cooling the metal in a salt bath, which can be achieved through different methods.
The most common way to achieve this coating is by using a torch and oxygen mixed together and applied with an object such as a cloth or brush. What if you have already ground your steel? Here are some tips for how to blacken steel after grinding!
How to Blacken Steel After Grinding?
Here are the tips on how you can blacken steel after grinding:
Tip #1: Use a Blow Torch
If you have a blow torch, it is the best option to blacken steel after grinding. You can use this method on any kind of steel, including cast iron and stainless steel. It will give your grinder an old-fashioned look in no time flat! Be sure that you don’t burn the surface.
Tip #2: Apply Vinegar and Salt
Get a piece of cloth, dip it in vinegar and then sprinkle salt over the fabric. After that, rub the steel with it until you see desired results. You can also use this method on other surfaces such as copper or brass to achieve different colorings.
Tip #3: Dip Your Grinder Into Paint Thinner
If you have paint thinner at hand, pour some amount into a bucket and dunk your grinder inside for several hours; remove from time to time to check if its surface is already blackened enough or not. This process will give an antique look that many people love! Just be sure to wash everything after using this technique. It’s highly toxic, so doesn’t have any traces behind it.
Tip #4: Use a Zinc Plating Solution
If you want to add some color and contrast, dip your grinder into a zinc plating solution. If done correctly, the surface of steel will be blackened while leaving other parts in silver or gold.
It depends on how many alloys were applied during the making process. You can also use this method for creating different colors such as pink and green! But make sure that everything is washed after using this technique. It’s highly toxic, so don’t have any traces behind it.
Safety Precautions When Blackening Steel After Grinding
If you choose to use a blow torch, be sure that all the safety precautions are considered. Also, make sure that you don’t burn any of your skin or hair; it will cause serious damage and might lead to death in some cases! Just follow these simple steps:
- Always wear gloves (heat resistant) before using a blowtorch on steel surface after grinding.
- Keep flammable materials away from the working area so they won’t catch fire by accident.
- Make sure there is enough ventilation around your working place since paint thinner and zinc plating solution releases dangerous fumes which can pollute air around you if not enough space is provided for proper flow of air.
- Always measure the amount of paint thinner you are going to use. Do not overfill your bowl with this solution since it will spill out during dipping process which is dangerous for surroundings.
In conclusion, blackening steel after grinding is not easy if you do it without proper preparation. Use these tips to prevent any accidents during the process! You may also want to read our post about the difference between an angle grinder and a polisher if you are interested in more information.