Over time, the metal water pipes in your home can begin to deteriorate due to a process called corrosion. Corrosion causes rust, holes, cracks, and other types of damage to metal pipes, resulting in numerous plumbing problems, such as water leaks. Iron, steel, copper, and lead water pipes are particularly susceptible to corrosion.
Some of the warning signs that the pipes in your home have been damaged due to corrosion include:
- Higher than normal water bills
- Pinhole water leaks or hairline cracks in pipes
- Discolored water
- Water with a metallic taste or odor
- Mold growth
- Persistent clogs or slow drains
- Low water pressure
- Water stains, spots, or other damage
TYPES OF CORROSION
There are several different types of corrosion. Uniform corrosion occurs evenly across the surface of the pipe, resulting in a uniform thinning of the pipe wall. Pitting corrosion results in small, deep pits on the pipe’s surface. This type of corrosion is particularly serious since it can lead to rapid deterioration to the pipe wall.
Galvanic corrosion happens when two different metals come into electrical contact due to the presence of an electrolyte (water). Crevice corrosion occurs in confined spaces, such as under gaskets or within threaded joints, where stagnant water can lead to localized corrosion.
WHAT CAUSES CORROSION?
Corrosion is a natural process that occurs as a result of electrochemical reactions between the metal in a pipe and various chemical, biological, and physical factors in the environment. Corrosion-related damage occurs slowly, over a period of time. Most homeowners don’t realize their pipes have been corroded until it’s too late.
CHEMICAL FACTORS THAT CAN LEAD TO CORROSION
The chemical composition of water plays a significant role in pipe corrosion. Water with a low pH (acidic) is more corrosive. High concentrations of chlorides and sulfates in water can be corrosive to pipes. Water with high levels of dissolved solids (salts, minerals) can lead to galvanic corrosion, a type of corrosion that occurs when two metals, such as copper and steel, are in close proximity to each other.
BIOLOGICAL FACTORS THAT CAN RESULT IN CORROSION
Certain bacteria, such as sulfate-reducing bacteria, produce hydrogen sulfide that can contribute to pipe corrosion. The formation of biofilms (colonies of microorganisms) on the interior surfaces of pipes can create localized areas of corrosion. Biofilms can also protect corrosive bacteria from chemical drain cleaners and other treatment processes.
PHYSICAL FACTORS THAT CAUSE CORROSION
High water velocity can cause physical erosion of pipe surfaces, especially at bends, joints, and fittings. Elevated temperatures can accelerate the rate of chemical reactions. For example, hot water pipes are often more prone to corrosion than cold water pipes. Mechanical stress and high pressure in the water system can cause pipes to crack and develop leaks.
PREVENTING CORROSION
There are many steps homeowners can take to prevent or reduce corrosion in their water pipes:
- Use corrosion-resistant materials, such as stainless steel, PVC, or PEX. Copper is also resistant to many forms of corrosion but can suffer from pitting.
- Adjusting the water chemistry, such as controlling pH levels and adding corrosion inhibitors, can help prevent corrosion. Water softening helps to reduce the levels of corrosive minerals.
- Apply protective internal linings or external coatings to pipes to provide a barrier against corrosive elements.
- Regular inspection and maintenance of your home’s water pipes can help detect early signs of corrosion and address them before they become severe problems.
CALL PREFERRED PLUMBING TO HAVE YOUR PIPES INSPECTED FOR CORROSION
If you’ve been noticing the signs of corrosion-related damage, contact the Pomona plumbers at Preferred Plumbing and Rooter Service without delay. We have the tools and training to inspect your pipes for corrosion and perform any necessary repairs or replacement. You can reach us at (877) 298-8105 or contact us through our website to schedule a service all today!