What is metal waterproofing?
We do not live in a perfect world. Although, if we follow direction and do our research carefully we can create tangible things that will last a long time or have a long life. However, there are always variables that can come into play with our theoretical or mental visions ultimately causing imperfections in our original plan.
This article is intended to explain what metal waterproofing actually is. It is also intended to give basic guidelines so an individual can feel comfortable and know what to look for when it comes to metal waterproofing.
"Explanation"
Metal waterproofing is the act of treating a metal so that it is protected from the corrosive induced effects (commonly called rust) that water can have on a metal material. When metal is exposed to the elements of nature or the surrounding environment many things can happen to break the metal down or cause it to rust. Rust can weaken the integrity or strength of a structure made from metal (see reference 1). Some metals are better than others in harsh environments so we must do our homework depending on the purpose of the application at hand and what kind of liabilities are present. Most of the time when someone needs to waterproof a metal the metal is an iron based material also possessing the element carbon (along with other elements sometimes depending on the class or grade of steel). The following techniques for waterproofing metals are some popular methods used within industries:
"Techniques"
1. Epoxy coating (see reference 2): there are different kinds of epoxy coatings. this method is popular for pipe interiors that distribute drinkable (potable) or non-drinkable (non-potable) water. It is also used for weatherproofing sloped metal roof surfaces.
2. Galvanized (see reference 1): There are 2 basic types of galvanizing; hot dipping and electroplating. Both of these processes use zinc as the protective ingredient or coating. Electroplating is more common because it is cheaper than hot dipping and also adheres well to steel. Galvanized products are often chain linked fence, flashing, or sheet metal. Galvanized material can also be painted, but be careful to prepare the material before painting it. It can normally be chemically etched or primed.
3. Painting (see reference 3): Paint is another common method to prevent steel from rusting. When painting bare steel it is important to prime the steel with a rust inhibiting metal primer. There are many different brands on the market (too many to list).
The previously listed methods of waterproofing are not the only ways, yet they are probably the most common for general applications.
"Concluding Statement"
The subject of metal waterproofing can become very complex if you put it under a microscope. However, this article was intended to give a basic understanding of what metal waterproofing is and how to go about applying it to a project. The most important thing to remember is to understand that certain variables in certain environments can cause metal to require a different type of waterproofing. Also some products that are "water resistant" are 100% "water proof" so pay attention to the fine print understand that metal waterproofing can be the difference between life and death when it comes to keeping a structure strong.
