Copper pipes are widely used in plumbing systems due to their durability and resistance to rust. However, over time, they can develop green corrosion, often referred to as patina. This greenish-blue buildup is a result of oxidation and prolonged exposure to moisture. While it may not always indicate serious damage, it should be addressed to prevent potential leaks and deterioration.
What Causes Green Corrosion on Copper Pipes?
Green corrosion forms when copper reacts with oxygen, water and airborne pollutants. Common causes include:
High moisture levels – Frequent exposure to humidity or water leaks can accelerate oxidation, making pipes more vulnerable to long-term damage.
Chemical exposure – Cleaning products, acids or certain plumbing sealants can react with copper, leading to faster corrosion.
Poor ventilation – Stagnant air in enclosed spaces, such as basements or cupboards, can contribute to corrosion and worsen oxidation over time.
Water pH imbalance – Water that is too acidic or alkaline may erode copper over time, leading to corrosion and possible leaks in the plumbing system.
If left untreated, excessive corrosion can weaken the integrity of the pipe and affect the performance of any copper pipe connectors, potentially causing leaks or failures.
How to Remove Green Corrosion from Copper Pipes
There are several methods to clean and restore corroded copper pipes:
Vinegar and Salt Paste – Mix equal parts of vinegar and salt into a paste. Apply it to the affected area, let it sit for 30 minutes, and then scrub gently with a soft cloth.
Lemon and Baking Soda – Cut a lemon in half, dip it in baking soda and rub it on the corroded area. The acid in the lemon helps break down oxidation.
Commercial Copper Cleaners – Specialised cleaners can remove corrosion efficiently, but always follow the manufacturer’s instructions.
By regularly maintaining copper pipes and addressing corrosion early, homeowners can extend the lifespan of their plumbing systems and prevent costly repairs.
Regular inspections, prompt repairs and using high-quality copper pipe connectors can help avoid leaks, improve efficiency and ensure long-term durability.
