11 10, 2019

Galvanized Steel: Types, Uses, Benefits.

2019-11-01T14:10:28+00:00October 11th, 2019|News Blog|

Part of an ongoing series on Galvanized Steel

Mosaic-style background of various galvanized steel textures with the words “Galvanized Steel: Types, Uses, Benefits” in the foreground.

What is Galvanizing?

Galvanizing, or galvanization, is a manufacturing process where a coating of zinc is applied to steel or iron to offer protection and prevent rusting. There are several galvanizing processes available, but the most commonly offered and used method is called hot-dip galvanizing. 

Galvanized steel is among the most popular steel types because of its extended durability, having the strength and formability of steel plus the corrosion protection of the zinc-iron coating. The zinc protects the base metal by acting as a barrier to corrosive elements, and the sacrificial nature of the coating results in a long-lasting and high-quality steel product. 

This versatility makes it applicable to a variety of projects and industries, including agriculture, solar, automotive, construction, and so on. Below, we aim to provide a comprehensive description of how galvanized steel is processed, different galvanization methods, its benefits, and how it is used in these various industries.

The steps in the galvanizing process are as follows:

  • The steel is cleaned in a degreasing solution
  • After being cleaned, the steel is pickled by being lowered into a vat of diluted hot sulfuric acid
  • The steel is then fluxed in an aqueous solution (typically zinc-ammonium chloride)
  • After the flux, the steel is galvanized through immersion in a vat of molten zinc
  • Afterward, the steel is inspected for consistency and a complete coating
A worker at National Galvanizing donning full safety gear as he stirs a molten zinc bath with stack of zinc ingots in the foreground.

What are the advantages of galvanized steel?

Many different industries utilize galvanized steel primarily because it has such a wide array of benefits for industries to take advantage of, including having:

Low initial cost compared to most treated steels. In addition, galvanized steel is immediately ready to use when delivered. It does not require additional preparation of the surface, inspections, painting/coatings, etc. sparing companies more costs on their end.

Longer life. With galvanization, a piece of industrial steel is expected to last more than 50 years in average environments, and can last over 20 years with severe water exposure. There is no maintenance required. The increased durability of the steel’s finished product also increases the product’s reliability.

The sacrificial anode ensures that any damaged steel is protected by the surrounding zinc coating. It doesn’t matter if the steel section is completely exposed; the zinc will still corrode first. The coating will corrode preferentially to the steel, creating a sacrificial protection to the areas that are damaged.

Rust resistance from the zinc coating. The iron elements in steel are incredibly prone to rusting, but the addition […]

29 05, 2019

Steel Service Center Spotlight: National Galvanizing

2019-06-19T19:06:59+00:00May 29th, 2019|News Blog|

An image depicting a galvanized auto body made of steel, with the words “Steel Service Spotlight – National Galvanizing” above.

National Material L.P. and its metal service centers have a long history of quality and service dating back to 1964. Since its founding, N.M.L.P. has grown to over 30 business units and is now one of the largest suppliers of steel in America. The National Material group of industrial businesses consists of five groups; Steel, Stainless and Alloys, Raw Material Trading, Aluminum, and Related Operations.

National Galvanizing, located in Monroe, Michigan is an ISO 9001:2008 certified leader in the heavy gauge galvanizing industry. Their 245,000-square-foot, state-of-the-art facility offers multiple services including pickling, galvanizing, galvannealing, and slitting, all in one location. This combination of capabilities provides customers with unparalleled responsiveness to meet the ever-changing demands of today’s steel market.

National Galvanizing is a joint venture between National Material L.P. and Heidtman Steel, and has been leading the heavy gauge galvanizing industry since 1984.

Advantages of Galvanized Steel

Galvanized Steel is treated with zinc to create a long-lasting alloy that is resistant to rust and corrosion. This process creates a final material with the strength and formability of steel plus the corrosion protection of zinc-iron coating. Zinc protects the base metal by acting as a barrier to corrosive elements, and the sacrificial nature of the coating results in a long-lasting and high-quality steel product.

  • Rust Resistance: The iron elements in steel is incredibly prone to rusting, but the addition of zinc acts as a protective buffer between the steel and any moisture or oxygen.
  • Easy Inspection: It’s easy to tell how strong a galvanized coating is just by looking at it. There are also quick stress tests that can determine how thick the zinc coating is.
  • Sacrificial Anode: This ensures that any damaged steel is protected by the surrounding zinc coating. It doesn’t matter if the steel section is completely exposed; the zinc will still corrode first.
  • Longer Life: With galvanization, a piece of industrial steel is expected to last more than 50 years in average environments, and can last over 20 years with severe water exposure. No maintenance required.

Galvanizing Advanced High-Strength Steel

In addition to leading the heavy-gauge galvanizing industry, National Galvanizing also provides complex galvanizing chemistries that allow for the galvanizing of advanced high-strength steel.

Galvanizing advanced high-strength steel, versus galvanizing regular steel, is a more sophisticated process. First, the coils of steel are cleaned and put through both a zinc pot and chemical treatment to passivise the rust. Afterwards, the steel is tempered and tension-leveled to produce a high surface quality on the galvanized steel.

In addition to the material durability described above, Galvanized Advanced High-Strength Steel is a remarkably strong material. Because AHHS is both light-weight and exceptionally strong, advanced high strength steel is becoming the go-to material for the growing regulatory needs of the automotive industry and beyond. Its concentrated properties allow manufacturers to easily reach their emission, safety, and fuel […]

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