Coins are objects of great historical and monetary value. However, over time, they can become corroded and tarnished due to exposure to moisture and the environment. The corrosion can make the coins look dull and unattractive, which can be disappointing for collectors and historians alike.
Cleaning corrosion off of coins requires careful attention to detail and the right tools. It is important to avoid damaging the surface of the coins, as that can greatly decrease their value. In this article, we will discuss some of the best ways to clean corrosion off of coins and restore their natural shine and beauty.
Understanding Corrosion and its Effects on Coins
Coins, especially those made of copper, brass, or bronze, tend to develop a greenish or brownish coating over time due to corrosion. This unsightly layer is caused by oxygen, moisture, and other environmental factors that react with the metal, producing a layer of copper carbonate or copper oxide. The corrosion process accelerates in humid or salty environments, as well as in contact with other metals or chemicals.
Besides being unattractive, corrosion can significantly decrease the value of a coin, especially if it damages the detail or letters on its surface. In severe cases, the corrosion can eat through the coin, creating holes or thinning the metal. Cleaning corrosion off of coins is a delicate process that requires patience and care, as improper techniques can leave scratches, remove the patina, or even damage the coin’s metal. Therefore, it is important for collectors to understand the causes and effects of corrosion and to learn the best ways to prevent, treat, and preserve their cherished coins.
The Different Types of Chemical Cleaners for Coins
There are various types of chemical cleaners available to remove corrosion from coins. Some of the most commonly used cleaners include vinegar, lemon juice, ammonia, and baking soda.
Vinegar is a mild acid that can dissolve corrosion from coins. It is recommended to soak the coins in a mixture of equal parts water and vinegar for 1-2 hours. Lemon juice works similarly to vinegar and can also be used as a gentle cleaner for coins. Ammonia is a more potent cleaner that can remove hard-to-clean corrosion. It is recommended to mix a small amount of ammonia with water and soak the coins for a few minutes before rinsing thoroughly. Baking soda is also a good option for removing corrosion from coins, especially for larger pieces. It is recommended to make a paste of baking soda and water and gently scrub the coins with a soft-bristled brush.
Non-Chemical Methods for Cleaning Corroded Coins
In this section, we will explore various non-chemical methods that you can use to clean corrosion off of your coins. One such method is using a soft-bristled toothbrush and warm water. Simply wet the coin under the tap and gently scrub it with the toothbrush to remove the corrosion. Be careful not to scrub too hard as this can cause further damage to the coin.
Another non-chemical method is using baking soda. You can mix baking soda with water to create a paste and apply this to the corroded areas of the coin. Let it sit for a few minutes, then rinse it off with warm water and pat dry. Remember to always be gentle when cleaning coins and refrain from using abrasive materials or chemicals that can further damage them.
How to Identify Genuine vs Counterfeit Coins amid Corrosion Risks
Identifying genuine coins from counterfeit ones becomes more challenging when you have to deal with corrosion risks. Forgeries often have a higher level of corrosion due to the type of metal used, and over time they might look just like original coins. There are several steps you can take to spot the differences between genuine and counterfeit coins. Firstly, pay attention to the design of the coin and compare it to known original coins. Look closely to see if there are any deviations from what you are familiar with.
Secondly, consider weight, size, and thickness. Usually, counterfeits will have slight differences that can give them away. The use of different non-standard materials such as zinc, nickel or tin in counterfeit coins results in lesser weights and size, while genuine coins have specific grading standards. Lastly, look for identifying marks, such as mint marks or other symbols or inscriptions that can be found on original coins. Counterfeiters typically leave these out or create their own, which is a red flag. These procedures won’t entirely ensure that you are getting a genuine coin. But knowing them will help you be on the lookout for fakes and avoid purchasing them.
Keeping Your Coins Clean and Safe from Future Corrosion
After removing the corrosion off of your coins, it is important to take necessary steps to avoid future corrosion. One way to keep your coins safe is to store them in a coin album or airtight container. This will protect them from contact with moisture, air, and other substances that may cause corrosion. Avoid handling the coins with bare hands and use gloves or a soft cloth instead to prevent contact with oils and acids on skin.
Another crucial step to keep your coins clean and protected is to keep them in optimal environmental conditions. Extreme temperatures can damage the coins and cause corrosion. Therefore, store them in a cool, dry and stable environment, away from direct sunlight. Regularly check the storage containers for any signs of moisture or corrosion. If you notice any signs of wear or damage, take immediate action to prevent further damage. By taking proper care of your coins, you can preserve their condition and value for many years to come.
The Dos and Don’ts of Cleaning Valuable Coins
Cleaning valuable coins can be a tricky task, and there are certain dos and don’ts that you should be aware of. When it comes to cleaning valuable coins, the first thing to remember is that you should never use harsh chemicals or abrasive materials. Instead, opt for gentle cleaning solutions such as warm water and a mild soap.
Another important “do” is to handle your coins with care. You should always wear gloves and avoid touching the surface of the coin with your bare hands. This is because the oils from your skin can cause damage to the surface of the coin. Additionally, be sure to store your coins in a safe place where they won’t be exposed to humidity or extreme temperatures. Overall, by following these dos and don’ts, you can ensure that your valuable coins stay in great condition for years to come.
Hiring a Professional Service for Cleaning Rare Coins with Corrosion
Sometimes, precious coins with corrosion are highly rare and valuable, and it goes without saying that cleaning these coins should only be carried out by trained professionals. It is imperative to find a professional coin restoration specialist with significant expertise and experience in the field to handle such coins delicately. One of the advantages of hiring a professional for coin cleaning is that they use specialized techniques and safe cleaning agents to ensure that the coins are thoroughly cleaned without damaging them.
Another advantage of hiring a professional coin restoration service is that it helps to ensure that the coin is preserved and will remain valuable. Professional coin restorers use their knowledge and expertise to detect the root cause of the corrosion and take the necessary steps to prevent further corrosion. After cleaning and restoring the coin, they provide recommendations on how to protect and preserve it better. This ensures that the value of the coin is not compromised, and it can be passed on to future generations in a pristine and preserved condition.
Final Verdict
Cleaning corrosion off coins is a delicate process that requires a lot of patience and attention to detail. There are several methods to choose from, but the safest and most effective way is to use the baking soda and water solution with a soft-bristled toothbrush. It is essential to avoid using chemical cleaners that may damage the coin’s surface.
If you are planning to clean a valuable or historical coin, it is highly recommended to consult a professional coin grading service beforehand. They can provide you with the necessary guidance and expertise to ensure that the cleaning process does not damage the coin’s value or authenticity.
In summary, cleaning corrosion off coins can be a satisfying and rewarding experience for collectors and enthusiasts. However, it is crucial to approach the cleaning process with caution and respect for the coin’s historical and cultural significance. With the right tools and techniques, you can restore your coins’ shine and beauty for many years to come.
