We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is Galvanizing?

By Eric Tallberg
Updated May 21, 2024
Our promise to you
All The Science is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At All The Science, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A process by which zinc is coated over corrosive metals is known as galvanizing. It is actually a method of coating corrosive metals, such as steel and iron, with a non-corrosive metal. Zinc is melted and applied, usually via what’s known as a hot dip, to the metal, providing a coating of corrosion protection from one mil (0.001 of an inch or 0.0254 mm) to just over four mils (0.004 inches or 0.1016 mm) thick. When cured, the zinc, through reaction with the coated metal, becomes zinc carbonate.

The galvanizing process not only prevents corrosion of various “soft” metals, but adds to the strength of the original, uncoated metal. Obviously, galvanized metal is thicker than uncoated metal, so fittings and fastenings are generally measured with the additional coating thickness in mind. Various American Society for Testing and Materials (ASTM) specifications provide guidelines and continuity for the thickness of galvanized metals.

Galvanization of nails and screws is the most common method of preventing the unsightly staining seen on many types of house siding. Non-galvanized steel nails and screws, when used outdoors, will “bleed” when they corrode, causing dark stains on the siding. This staining is only eliminated by re-painting the siding. Staining on a building facade due to corroded nails, screws, or other types of fasteners, is not only ugly, but also indicates that, because they're not galvanized, the fasteners are deteriorating and must be replaced.

The hot dip procedure to galvanize metals is essentially a bath of molten zinc. The zinc is kept liquefied at a temperature of about 860°F (460°C) and the metals to be coated are dipped into or, in some cases, fed through this zinc bath. Prior to dipping, metals are cleaned and prepped for the hot dip by pickling in a light acid solution. The zinc coating is ordinarily distinguishable from shiny bare steel or iron in that it is a dull, medium gray. Magnesium is put into the hot dip solution when galvanized metals are to be used in a marine environment.

Electro-galvanizing is an electrolytic process where a thinner, tighter-bonding coat of zinc is applied to a metal via electroplating. In this process, an electric current is passed through a zinc compound, positively charging the zinc ions to adhere more securely to the conductive primary metal. It provides a somewhat stronger tensile strength to the coated metal by virtually impregnating the metal with zinc. This process is most commonly employed with iron or steel beams, angle-irons, and other items that are to be used in building construction. Hot dip and electro-galvanizing are the most common of several methods of galvanizing metal.

All The Science is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.

All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.