The corrosion happened to pre-painted steel sheets is mainly caused by the breaking of the thinner coating layer after being attacked by water.

Each of the galvanized pre-painted steel sheets has a surface coating composed of around 55% of aluminum, 43.5% of zinc and 1.6% of silicon, making the sheets possess the advantages of zinc and aluminum, and enjoy the absolutely excellent performance of corrosion resistance, acid resistance, and heat resistance.

The steel products of SYSCO belong to the top-class brand products in the market of galvanized steel sheets in Taiwan. SYSCO's products always insist on keeping a certain thickness for both the bottom material and the coating layer. In the manufacturing process of products, SYSCO accurately controls their thickness so as to protect the high quality of products.

The main promotion product of SYSCO is AZ150 (code of coating layer). Comparing with other products in the market, AZ150 is not offered at a very high price (the price difference is around thousands of dollars per 100 pings [1 ping = 3.3058 square meters]). However, the difference in durability is extremely great.

The area comparison of SYSCO with other products

Order Gauge x widrh(mm) Zinc coating Cold rolled gauge Lenght(m) /ton Square meter SYSCO PPGL 0.42 x 914 AZ150 0.376 347 317 Others PPGL 0.42 x 914 AZ100 0.350 377 345 Others PPGL 0.42 x 914 Z12 0.350 374 342

※ Above value is based on that size and layer under the theories calculate

SYSCO PPGL, square meter of metric ton

Cold rolled gauge (mm) 0.27 0.30 0.35 0.40 0.50 0.60 0.70 0.80 Square meter /ton 431 391 339 299 242 204 176 154

※ Above value is based on that size and layer of AZ150 under the theories calculate