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. Getting better all the time.

BHP ZINCALUMEŽ Aluminium/Zinc alloy coated steel. A brilliant invention launched in Australia in 1976, it is now setting the highest standards in corrosion resistance and long life coupled with good formability.
        ZINCALUME steel was developed after extensive research into methods of improving the performance of the traditional 'galvanized iron'.
        Researchers found that by blending aluminium with zinc to give an alloy coating, corrosion protection could be greatly enhanced. In fact, repeated testing has proven ZINCALUME steel has a lifetime of up to four times that of galvanized steel under the same conditions.
        To say the least, that's an amazing improvement.

WHEREVER YOU GO, IT'S THERE.
        Its versatility and benefits have resulted in ZINCALUME steel becoming a familiar part of the Australian way of life. It is used with striking effect by architects to create the latest in modern building design, through to roofing the traditional Australian homestead. But that's just for starters.
        Its applications are endless. From roofing and walling, garage doors, electrical cabinets, 'white goods' home appliances...as steel house framing. Not to mention guttering, automotive mufflers and pressure-formed components. The list goes on and on.
        Something else, and very important. Every sheet of ZINCALUME steel is carefully branded.
        It enables us to maintain the strictest quality control. The brand lets you know you're getting the same quality product every time. True value.

CONSTANTLY IMPROVING.
        BHP has constantly improved the process for producing ZINCALUME steel. Its well known silver-spangled surface is a familiar face across Australia found on all kinds of building and manufactured products needing a high level of corrosion resistance.
        Today's ZINCALUME steel is even better.
        Due to a specially formulated resin coating, the product's performance had been greatly enhanced, the surface has an even smoother feel and superb satin finish.
        Most importantly, rollformers, manufacturers, fixers, engineers and builders have a product which is of the highest quality.

ZINCALUME steel is the time-proven
roofing material for today.
For framing, ZINCALUME steel is performance-proven for long life.

In the manufacture of products which are exposed to changing elements, ZINCALUME steel ensures long life.
A beautiful satin-smooth resin finish, may be easily painted with water based acrylic and protects against handling marks and scuffing.
. Coating specifications.

The coating on ZINCALUME steel comprises 55% aluminium, 43.5% zinc and 1.5% silicon. It has excellent forming capabilities and is also available in high strength grades. It also provides a superior surface for painting.
        The two main coating classes for ZINCALUME are AZ150 (150 g/m2 minimum coating mass) and AZ200 (200 g/m2 minimum coating mass). Other coating classes made be made available after discussion with BHP to match your technical requirements.
        BHP coating mass control technology is amoungst the most advanced in the world. A highly sophisticated coating mass guage is linked to a computer in a closed-loop control system ensuring accurate control of coating mass.



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PROVIDING THE RIGHT PROTECTION.
The Aluminium/Zinc coating on ZINCALUME steel provides remarkable corrosion resistance. It protects the steel base in two ways.
First, it provides a tough physical barrier between extreme atmospheric conditions and the inner core of steel. Protection is afforded by the corrosion resistance of the coating itself.
Next, it protects the steel at cut edges and scratches. This is achieved through the sacrificial protection provided by the zinc in the coating. Galvanic action causes the zinc compounds to automatically build up at cut edges and around scratches through an electrolytic reaction when water or moisture is present. It slows the rate at which the surrounding coating is consumed around damaged areas. This effect is sometimes referred to as the 'self healing' property of coatings containing zinc.
ZINCALUME steel provides and excellent combination of physical and cut edge protection.

Atmospheric exposure tests confirm its corrosion resistance is far superior to that of ordinary zinc coatings, lasting up to 4 times longer in an identical environment.