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Black steel vs galvanized steel: Understanding the differences

Black steel vs galvanized steel: Understanding the differences

BlogDate: 12-07-2024 by: Ngoc Cam

Black steel vs galvanized steel are two types of steel that are commonly used in the world for fields such as construction or manufacturing. However, not everyone can distinguish between these two types of steel and use them correctly. So in the article below, MRS Steel will help you learn what these two types of steel are, their outstanding features and applications in life.

Black steel and galvanized steel differ in features and applications, commonly used in construction and manufacturing
Black steel and galvanized steel differ in features and applications, commonly used in construction and manufacturing

What is the black steel and galvanized steel

Black steel (carbon steel) is steel with a dark blue or black surface due to water spray cooling. Black steel is usually produced in two main types: black box steel and black steel pipe for different purposes.

Galvanized steel differs from other types of steel in that it is coated with a layer of zinc oxide to protect the surface. The zinc coating prevents the inner steel surface from rusting, resists oxidation and prolongs the life of the steel.

Black steel has a dark surface, while galvanized steel is zinc-coated to prevent rust
Black steel has a dark surface, while galvanized steel is zinc-coated to prevent rust

Black steel vs galvanized steel: Comparison of pros and cons

Black steel is a commonly used product up to now with a diverse range, rich in both size and design for users to choose from.

Like other types of construction steel, thanks to the outer zinc coating layer, galvanized steel products are much more resistant to corrosion, rust and oxidation than traditional black steel.

In addition to the ability to help products have higher durability, galvanized steel also has high aesthetics for projects in harsh weather conditions. Using galvanized steel, customers will not have to paint or maintain periodically, but the product still ensures durability and longevity.

Galvanized steel, featuring a protective zinc coating, resists rust and oxidation, offering high durability compared to black steel
Galvanized steel, featuring a protective zinc coating, resists rust and oxidation, offering high durability compared to black steel

Learn about the differences in functionality between black steel and galvanized steel

Black steel is often used in ultrasonic pile systems, load-bearing scaffolding and prefabricated steel buildings. Moreover, they are also used in oil and gas pipeline systems and boiler systems in the industrial sector.

Galvanized steel is used for factory frames, piping systems in high-rise buildings,... Thanks to its shiny appearance and high aesthetics, galvanized steel is also an ideal material for interior decoration, telecommunications poles, lighting poles,... In addition, galvanized steel is also used to make auto parts, truck frames,...

Black steel is used in piles, scaffolding, and pipelines, while galvanized steel suits aesthetics and durability
Black steel is used in piles, scaffolding, and pipelines, while galvanized steel suits aesthetics and durability

When comparing black steel or galvanized for water transportation, GI pipes are generally preferred over black steel pipes for water transportation due to their superior corrosion resistance. Black steel pipes, which lack a protective coating, corrode easily when exposed to water, making them unsuitable for potable water applications.

Instead, they are typically used for gas, oil lines and fire sprinkler systems because they are durable and suitable for high-pressure applications​​. In contrast, galvanized steel pipes are coated with zinc, which provides significant protection against rust and corrosion, making them ideal for both indoor and outdoor water supply lines. Despite being more expensive due to the zinc coating process, galvanized pipes offer better long-term cost-effectiveness because of their extended lifespan in water applications​. Therefore, while black steel pipes are cost-effective and strong for specific non-water uses, galvanized steel pipes are the better choice for water transportation due to their durability and corrosion resistance​.

What is the difference between Black steel vs Galvanized steel?

Corrosion Resistance

One of the biggest differences between black steel and galvanized steel is their corrosion resistance.The zinc coating on galvanized steel pipes provides better corrosion resistance compared to black steel pipes. Galvanized steel is coated with a protective zinc layer through electroplating, which enhances corrosion resistance and prevents mineral buildup that can clog pipes.

Explore more: Galvanized steel pipe vs black steel pipe: Which one is right for your project?

Black steel has low resistance, while galvanized steel, with zinc coating, offers high resistance
Black steel has low resistance, while galvanized steel, with zinc coating, offers high resistance

Manufacturing Process

Black steel is fabricated into steel pipes through a process that involves twisting and welding. Initially, the steel sheet is bent into a tubular shape. The edges of the sheet are then welded together to form a continuous steel pipe. For galvanized steel, the manufacturing process involves submerging the formed steel pipe into a molten zinc bath maintained at temperatures between 820 and 860 degrees Fahrenheit. Following this, the pipe is rapidly cooled to minimize the interaction of the zinc layer with the surrounding air, ensuring a durable, corrosion-resistant coating.

Longevity

Black steel has a lifespan of up to 20 - 25 years if used in conditions not affected by chemicals, high temperatures,... Galvanized steel projects can last for over 50 years under normal conditions and from 20 - 25 years under conditions of continuous exposure to corrosive chemicals, coastal environments, industrial zones...

Durability

Black steel has the ability to withstand external forces well. In addition, this type of steel has high uniformity over the entire length of the pipe body, helping to increase the life of the pipe and ensure the sustainability of the project. In particular, black steel is less likely to shrink when heated. Comparing black steel vs galvanized steel in terms of durability, galvanized steel has high durability, the outer galvanized coating helps the steel withstand harsh weather conditions, operate in acidic and corrosive environments. high humidity.

Black steel is durable and galvanized steel resists harsh conditions and acidity
Black steel is durable and galvanized steel resists harsh conditions and acidity

Cost

Galvanized steel is more expensive than black steel but in return has much better longevity and quality.

Where to import high-quality Vietnamese galvanized and black steel at the best price?

Vietnam ranked 12th among the countries with the largest crude steel output in the world in 2023 with 19 million tons. Vietnamese steel is increasingly asserting its position and quality on the global steel map when exporting to many countries with strict standards such as the United States, Europe, Australia, Mexico,... If you are looking to expand your sources of affordable, quality steel, you cannot ignore importing Vietnamese steel.

Compared to finding factories, customs clearance procedures and transportation, which takes a lot of time and effort, importers should choose steel import support units like MRS Steel to save costs and effort in purchasing. We have a network connecting the largest steel manufacturers in Vietnam, a team of experts who understand the market and the process of exporting Vietnamese steel to many countries around the world. MRS Steel will help you access the best supply of black steel and galvanized steel in Vietnam via Email: vanloc@mrssteel.com.vn or Whatsapp: +84 769 112 358.

Above is some information about the differences between black steel vs galvanized steel to help you better understand the characteristics of each product. Don't forget to follow and read more useful knowledge sharing articles at MRS Steel!


đã bs từ khóa black steel or galvanized for water

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