By following these steps, you can maintain your katana blade and keep it free from rust.
Keep the blade dry: After using the katana, wipe the blade down with a dry cloth to remove any moisture. This will prevent the blade from rusting.
Avoid touching the blade with bare hands: the oils and sweat on your hands can cause the blade to rust. So, avoid touching the blade with bare hands. Instead, wear gloves or wrap the blade in a clean cloth when handling it.
Use a rust inhibitor: You can use a rust inhibitor to protect the blade from rust. There are many rust inhibitors available in the market, including oils, waxes, and sprays. Apply a thin layer of rust inhibitor to the blade after cleaning it.
Store the katana properly: Store the katana in a dry place with low humidity. A katana should be stored in a wooden scabbard (saya), which will protect the blade from moisture and other elements. Make sure the saya is clean and dry before storing the katana.
Clean the blade regularly: Regular cleaning of the blade is important to remove any dirt, debris, or rust that may have accumulated. Use a soft cloth or brush to gently clean the blade. You can use a mild soap solution if needed. After cleaning, make sure to dry the blade thoroughly.
Handle the blade with care: When using the katana, handle the blade with care. Avoid hitting hard objects with the blade, as this can damage the edge or cause chips in the blade. When not in use, make sure to store the katana in a safe place.