The Different Types of Corrosion

Written by  //  April 20, 2021  //  Construction Materials  //  Comments Off on The Different Types of Corrosion


Owning, building, or even flipping a home requires knowledge about plenty of things. Many people are surprised by how much they must know about their home. Homeowners need to know how to take the best care of their home because they are responsible for its maintenance—not to mention they want its resale value to increase.

One thing that can affect homes that often goes unnoticed is corrosion and rust. Rust can affect any metal, and there are multiple forms of rust. Learn the different types of corrosion so you can protect your home from the damages of rust.

Galvanic Corrosion

Galvanic corrosion is one of the most common forms of rust that affects home applications. If you own a home, the places you’re most likely to find galvanic corrosion are in plumbing applications. Galvanic corrosion occurs when two dissimilar metals meet.

This is not uncommon in galvanized steel plumbing lines that are connected to new copper lines through a threaded connection. The corrosion manifests as typical rust and often signifies that it’s time to replace the old plumbing materials in your home.

Galvanic corrosion is best prevented by using similar metals near each other and limiting the touch points of dissimilar metals.

Flow-Accelerated Corrosion

Flow-accelerated corrosion is less common in typical homes but can still become an issue within the pipes of your home, depending on a few factors. This form of rust is hard to catch because it usually shows itself on the inside of pipes and takes time to spread to the visible parts.

Since this form is so hard to catch, it’s vital to understand how to prevent it in your home. It occurs from the flow or velocity of water in a pipe and is especially likely in pipes that carry hot water.

Pitting Corrosion

Pitting corrosion is another very common form of deterioration in the home. It is a localized form of corrosion that appears to create holes or “pits” in metal surfaces. Pitting corrosion is difficult to detect and notoriously challenging to solve. It’s common on these everyday household materials:

  • Copper
  • Stainless steel
  • Aluminum
  • Nickel

These materials are common in pipes and major home appliances. Even though these materials are renowned for their rust resistance, pitting corrosion is likely. Keep a close eye on your appliances and consult a plumber if you’re worried about corrosion on your copper pipes.

There are, of course, many different types of corrosion that could potentially affect parts of your home. These three forms are the most common types of corrosion that are typically referred to as rust. Even corrosion-resistant metals such as stainless steel is not safe from rust if not properly care for with preventative measures.

If you’re concerned about your metals corroding or experiencing other forms of deterioration, be sure to consult a metal expert or builder on the best metals for rust resistance. It’s also beneficial to closely monitor metals so you can catch signs of corrosion early and fix any issues more easily.

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