The history of coated steel began with measures to counteract steel's weakest point: rust. Steel-coating methods can be divided into plating and coating and plating further divided into electroplating and hot dipping. Today, steel is coated not only for protection against rust but also to meet the demand for environment-friendly features, such as product longevity, efficient use of resources, process efficiency, and cleanliness. In hot dipping, we diversify and combine both the substrate and coating materials to create unique, heat-resistant, and corrosion-resistant products. Through this process, we achieve sophisticated, long-lasting products. In electroplating, we fuse high-quality membranes to the plate to produce products with such beneficial features as emollient surfacing and superb processability.
    In consideration of the environment, we have totally eliminated hexavalent chromium from the post-treatment process.
We have created numerous products that feature enhanced aesthetics as well as such benefits as superb processability, pollution prevention, and wear and abrasion resistance. Some examples are Tecstar, which is a super-corrosion-resistant precoated steel that maintains its surface quality, even during deep drawing; our lubricated galvanized steel, which eliminates the customer's need for product degreasing; and our heat-resistant, nonadhesive steel.

The hot-dipping technique is derived from the YG method, which has been used to develop numerous products, as it allows a greater variety of base material and plating material combination matrices. Examples of these products include PAINTITE (zinc-coated steel), ALSTAR (aluminum-coated steel), Galvastar (55% aluminum-zinc-alloy-coated steel), and ZAM^® (next-generation hot-dipped, super-corrosion-resistant zinc-aluminum-magnesium-alloy-coated steel). We are creating products with special features that meet the needs of our clients and finding optimal applications for the sheet products we manufacture.

As electroplating can be used to coat products of any shape, this method has a wide variety of applications, especially in the electronics industry. Our Moonstar Zinc and Moonstar Zinc Super are representative of our electroplated galvanized steel product lineup.

ZAM^® is hot-dipped zinc-aluminum-magnesium-alloy-coated steel developed as a highly suitable new product for the 21st century. Our newly developed technology, which involves adding magnesium bath at a stable rate during the plating process, enables super corrosion resistance without increased coating weight.
In addition to its durability, ZAM^® is an apt response to the shift from the use of wood to steel as a construction material. ZAM^® contributes to the conservation of forests and is thus friendly to society and the environment. ZAM^® is the product of the new galvanizing line at the Toyo Works, and we are working to expand its applications.

 

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