ThePipingMart Blog Metals How to Corrode Copper?

How to Corrode Copper?

Corrode Copper

If you’re looking for a unique effect to add to your artwork or jewelry, corroding copper is an easy and efficient way to do so. Corroding copper utilizes natural elements found in the air to promote oxidation on the surface of the metal, giving it a patina that will last for years. Read on to learn how you can create this beautiful effect yourself!

What You’ll Need

The most important thing you need for this project is copper. Metal sheets are the easiest, but any type of copper object can be corroded—think coins, jewelry, utensils, etc. Other supplies needed include vinegar, salt (sodium chloride), and hydrogen peroxide (3%). If you have access to ammonia hydroxide, it will also speed up the process significantly.

Creating the Patina

To begin, mix together equal parts salt and vinegar until they form a paste-like consistency. Then spread the mixture over your copper object(s) until they are completely covered. Next, pour hydrogen peroxide over them until they are soaking wet. If you have ammonia hydroxide available, too, pour some into the mixture as well. Leave your objects sitting in this mixture overnight or longer, depending on how dark of a patina color you want them to have. After that time has passed, rinse off all of the chemicals with warm water and admire your work!


Corroding copper is an easy way to give any object a beautiful patina finish that will last for years! With just a few simple ingredients and some patience, you can create stunning artwork or accessories in no time at all. Whether you’re looking for something new for yourself or an original gift for someone else, corroding copper is sure to make an impression!

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