POSCO Establishes Market Base for Corrosion-Resistant Special Steel 'POSMAC'

- After over 2 years of effort, ternary high-corrosion-resistant galvanized steel sheets for stabilizer materials reflected in China's building certification standards
- Creating conditions for POSMAC adoption in the 300,000-ton annual Chinese stabiliz

[Asia Economy Honam Reporting Headquarters, Reporter Heo Seon-sik] POSCO announced on the 17th that after more than two years of effort, it has succeeded in incorporating its ternary high-corrosion-resistant galvanized steel sheet into the Chinese construction stabilizer certification standards.

The China Association for Standardization of Construction Engineering recently certified the ternary high-corrosion-resistant galvanized steel sheet as a "suitable material" for use in stabilizer manufacturing within the Chinese construction industry.

As a result, POSCO's ternary high-corrosion-resistant galvanized steel sheet product, "PosMAC," is expected to secure a favorable position in the Chinese stabilizer market, which has an annual scale of 300,000 tons.

The ternary high-corrosion-resistant galvanized steel sheet refers to hot-rolled or cold-rolled steel sheets plated with three alloys?zinc (Zn), magnesium (Mg), and aluminum (Al)?to prevent corrosion. Compared to general hot-dip galvanized steel sheets, it offers corrosion resistance that is 5 to 10 times higher. POSCO markets this product under the name "PosMAC."

Since the 2008 Sichuan earthquake, China has enacted legislation mandating the application of stabilizers in buildings, which has been compulsory for all buildings since 2019.

In the industry, hot-dip galvanized steel sheets have mainly been used as stabilizer materials; however, due to increased building lifespan requirements, enhanced corrosion resistance demands, and environmental issues, demand for alternative materials has grown. Nevertheless, ternary high-corrosion-resistant galvanized steel sheets like PosMAC were not reflected in Chinese construction certification standards, limiting their adoption as materials.

Accordingly, to expand PosMAC sales, POSCO registered as a proposing organization for the establishment of Chinese certification standards in 2019 and collaborated with POSCO China, POSCO International, and others to conduct technical exchanges with the China Academy of Building Research Co., Ltd., participating in both online and offline public hearings to promote the standard certification of ternary high-corrosion-resistant galvanized steel sheets.

In particular, by encouraging the strengthening of quality standards such as corrosion resistance evaluation methods and minimum plating thickness settings, POSCO created conditions favorable for the adoption of the competitively superior PosMAC product compared to other steelmakers.

With the new certification standard allowing the application of PosMAC products from December this year, POSCO plans to support customers by providing product utilization technologies such as roll forming shape analysis to help them secure the Chinese stabilizer market.

Meanwhile, POSCO is expanding the application of PosMAC products in various construction sites, including residential and commercial facilities, plants, and logistics centers, by developing stabilizers in collaboration with Koris ENT, a leading domestic prefabricated channel system manufacturer, last year.

This content was produced with the assistance of AI translation services.