Introduce GALVANIZED, Mainstay Shield MAGNA SYSTEM

Introduce GALVANIZED, Mainstay Shield MAGNA SYSTEM

Until now not many people know that ALL metals have a natural tendency to return to a state like time ore (metal ore), if exposed to constant atmospheric conditions. One form of this condition is corrosion, and most clearly seen in iron (iron). Steel (steel) which is a mix (alloy) between iron, carbon and other materials is also not spared from the corrosion process if left exposed to open air (atmospheric conditions).

The corrosion process causes far more serious damage than simply making the steel surface rough. Continuous corrosion alters the shape of the material that ultimately results in the strength of the material – both in holding the load and maintaining its stiffness – diminishes and in turn leads to structural failure.

The corrosion protection effort on iron and steel is a major prerequisite in the use of both for both practical and structural uses. Today amidst a variety of corrosion protection, the galvanizing process, especially hot dipped galvanizing (hot dipped galvanizing), is the most popular, and has existed for more than a century and a half ago.

The term “galvanized” is taken from the name of Luigi Aloisio Galvani, a physicist at the University of Bologna, Italy who in 1772 invented the electrochemical process between metals in one of his experiments. Galvani’s research is continued by Alessandro Volta that produces electro-potential rules between metals, and is enhanced by Michael Faraday who invented the “sacrificial of Zinc coating” process. The purpose of the process is to “sacrifice” the Zinc layer outside the iron layer, where the Zinc layer exposed to atmospheric conditions will be exposed to corrosion first, thus protecting the layer of iron covered. This is the basic principle of galvanization that we know today.

Now what is meant by galvanizing is the anti-corrosion coating which consists of 95% Zinc. Galvanizing is one type of cathodic protection, in which the protected metal / metal is made cathodic, and is covered with another anodic metal layer. The electrochemical reaction between the two causes the metal blanket to be “sacrificed” and corrode earlier than the metal it protects.

Another advantage of this cathodic protection is when there is a cathodic metal part that is cut or disabled so that the part is exposed or exposed to atmospheric conditions. When that happens, the anodic layer will instantaneously work to “protect” the “wounded” metal through electrochemical reactions.

The high tensile steel (section) profile used by Magna System is galvanized coated with Z275 thickness (275 gram / m2) for profiles used as main structure and Z220 (220 gram / m2) for profiles used as supporting structures. This thickness far exceeds the minimum requirement required by the American Society for Testing and Materials in ASTM A1003 / A1003M-05 ie Z180 (180 gram / m2).

The power of Galvanic Magna System coating has been proven over time. One of the projects that used Magna System in Halmahera, Maluku around the year 2009, until now no visible signs of rust on the profiles. In fact, the location of the mine project is adjacent to a coastal area that in fact has a higher corrosion risk than urban areas. In many other cases, it has been proven that the Z220 galvanized coating can pass through 15 years of usage without any sign of rust.

In conclusion, with the correct selection of galvanized coating thicknesses, the use of galvanized Magna System layered structures is a definite answer to the need for structures with excellent anti-rust protection. In addition, the galvanic resistance to cement (mortar) water is an added value given the difficulty of protecting steel material from exposure to mortar at the project site.

REFERENCES:

Waldman, Jonathan, 2015, “Rust: The Longest War”, Simon & Schuster Paperbacks, New York
American Galvanizers Association (galavinzeit.org)
Wikipedia (en.wikipedia.org) – keyword search: galvanizing, zinc, cathodic protection, Luigi Galvani

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