Zinc: The Sacrificial Lamb in Hot-Dip Galvanizing

Steel CorrosionSteel is susceptible to corrosion, and there are many factors that could contribute to it. There are various ways to fight it. But, it also depends on the structure built because the coatings used to counteract the effects of corrosion can be costly, depending on the formulation used.

The damage done by corrosion costs the United States around billions of dollars annually, making them a large contributor in the world’s annual cost for metallic corrosion.

One of these is Hot-Dip galvanizing (HDG). Gutter Helmet provides an overview of this type of galvanization below:

Hot-Dip Galvanizing

This is a process in which a bond between the coating and the steel occurs, and the coating virtually becomes one with the steel. The steel goes into a vat of molten zinc. The process is simple, but it is an effective method to fight corrosion.

While zinc is also susceptible to deterioration, its rate of damage is only 1/30 that of steel. It completely covers the surface and seals the steel from penetration of the elements. The natural weathering that occurs on the coating develops as an additional layer of protection as well.

Benefits of HDG

One of the main benefits of this process is that its application is fast and easy. Inspecting it becomes easier, even with the naked eye. It also requires less maintenance and costs less when you think long-term.

It also protects small, damaged areas. This type of coating corrodes in a way that steel can use it to its advantage. The zinc provides sacrificial protection. This is where a more active metal donates electrons to the damaged areas of the protected metal, replacing those lost due to oxidation. In a way, it provides complete protection.

If you are looking for coatings for your house’s exterior, consider galvanized coatings. It is important to think of the possible effects the different outdoor elements has on the different metal components of your home, especially steel.