How to Prevent Galvanic Corrosion

Galvanic corrosion is the most common type of corrosion. It is the result of two metals with varying electrochemical energy levels linking via a conductive path. It’s very common for dissimilar metals with similar structures to experience galvanic corrosion because of their different energy levels. Galvanic corrosion is typically detrimental to metals and can quickly result in damage and holes, which is especially dangerous in infrastructure and pipelines. Learn more about protecting your metals with this guide on how to prevent galvanic corrosion.

Cathodic Protection

Cathodic protection is the most effective method for preventing galvanic corrosion. It works to prevent corrosion by converting all the active sites, also called anodic sites, on the surface of the metals to passive sites, also known as cathodic sites. Cathodic protection converts active sites to passive sites by producing an electrical current from a secondary source. This prevents the corrosion of the metal and works to continuously keep the metal protected. Scheduling a cathodic protection inspection can help you to get a better idea of what cathodic protection is necessary to protect your metals from galvanic corrosion.

Use metals that are similar

Another method to prevent galvanic corrosion is to use metals that are not dissimilar. This can cut down on the formation of galvanic corrosion. This type of corrosion is the result of dissimilar metals with similar structures linking through a conductive path. By limiting the metals you use to only those that are considered similar and have natural corrosion resistance, you minimize galvanic corrosion. Though this method can be helpful, it is not particularly effective without another form of protection, especially for metals that live in wet or humid environments.

Apply a sacrificial coating

Applying a layer of paint known as a sacrificial coating is another method of preventing galvanic corrosion. The coating works to protect the metal from corrosion by taking the brunt of the damage itself. This is not a permanent solution, and paint needs frequent reapplication to keep the coating intact and continuously protecting the metal. This is a good method to pair with the method of using similar metals.

For all your cathodic protection and galvanic corrosion prevention needs, contact Dreiym Engineering, where our team of professional engineers will work to protect your metals from the damage of galvanic corrosion.

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