How to prevent corrosion on galvanized steel pipes？

The most important step in preventing corrosion on galvanized steel pipes is keeping it out of environments where it is exposed to substances with a pH below 6 or above 12.

Another long-term consideration in maintaining the finish on galvanized steel pipes is insulating it from contact with dissimilar metals. Copper and brass encourage electrochemical reactions that deplete the zinc coating on galvanized steel pipes.

Do not clean or degrease galvanized steel with abrasive cleansers. The process of wetting and drying in normal weather builds up a protective patina of zinc over galvanized steel pipes that protects it from the elements. Constant abrasive cleaning destroys the patina, so it has to be built up over and over again, bringing time to first maintenance unnaturally early in the life of the steel.

When galvanized steel pipes are placed in service in coastal or industrial locations, it needs to be washed with water on a regular basis to remove potentially corrosive salts and chemicals. And galvanized steel pipes should never be stored in a damp, poorly ventilated warehouse.

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