Final answer:
To maintain metal tools, one should apply protective coatings such as paint or oil to prevent corrosion, regularly check for scratches or wear, and use plating for extra protection. Additionally, proper operational procedures, including cleaning with chemicals during use, are key to maintenance.
Step-by-step explanation:
Maintenance of metal tools is crucial to ensure their longevity and proper functioning. One effective way to prevent tool corrosion is by applying a protective coating on the surface of the metal tools, such as paint or oil, which inhibits contact with oxygen. However, it's important to regularly inspect for and address any scratches in the paint or areas where the oil has worn off, as these imperfections can lead to the onset of corrosion.
For tools that are highly sensitive to corrosion, a technique known as plating might be used, wherein the tool is coated with another metal that is resistant to corrosion, much like how an iron "tin can" is protected by a thin layer of tin.
In addition to surface protection, the actual operation of machinery and metal tools may involve specific procedures, such as turning on a tap to allow chemicals to clean the tool during use, as described in the initial example. Post-use, it's recommended to remove debris and any chemical residue which could contribute to wear and tear.