MaterialsHOPPE brand fittings are manufactured from high-grade materials: aluminium, stainless steel, polyamide or brass. You can find out what makes our materials so special here.
HOPPE brand aluminium hardware is manufactured using high quality, corrosion-resistant primary alloys. The surface of our aluminium fittings is protected by either anodising or powder coating.
Anodising consists of a controlled, electrically induced oxidation process with the aid of sulphuric acid, which causes the base material to bond with oxygen and to grow a protective surface layer, the so-called oxide film. This film protects the products against detrimental influences such as hand perspiration, humidity and light mechanical stress.
In powder coating, the coating powder is applied to the aluminium surface by means of an electrostatic process. It is then heated to a temperature of 150–200 °C causing the paint particles to melt to a film of paint in a chemical cross-linking reaction.
There is no known risk to health in aluminium hardware.
No special care is needed for aluminium as the oxide film protects it. Dirt can easily be removed with a damp cloth.
HOPPE brand stainless steel hardware is manufactured from chrome-nickel steel (steel no. 1.4301 to DIN). Thanks to its longevity, its harmlessness to the environment and to health as well as its corrosion acid-, and abrasion resistance, it is used in the food industry as well as the medical and domestic sectors besides the building trade.
Stainless steel is also called corrosion-resistant because the alloy components of chromium and nickel develop an invisible passivation layer. If stainless steel hardware show signs of rust, they are caused by rust particles naturally present in the atmosphere.
Rust particles as well as traces of dirt and grease can be removed with a household detergent suitable for stainless steel.
Stainless steel hardware is also available with our Resista® surface guarantee.
HOPPE brand polyamide hardware is manufactured using high quality polyamide (PA) which not only has enhanced mechanical properties but is also impact and wear resistant. Combined with its anti-static properties, and weathering and chemical resistance makes it a favourite material for engineering applications, such as hardware. If necessary, HOPPE polyamide products are additionally UV-stabilised.
HOPPE brand brass hardware is made of high quality brass alloys. The surface is protected either by a transparent lacquer of elevated adhesive strength and resistance to solvents and chemicals, by electro plating such as chrome-plating or by a special vacuum coating process. If the protective coat of lacquer is damaged by mechanical action such as accidental scratching with keys corrosion (tarnishing brown) can occur.
Brass hardware requires no special care. Dirt can easily be removed with a damp cloth. Use of caustic cleansers should be avoided.
Brass hardware is also available with our Resista® surface guarantee.