Zinc handles have been fitted for years to patio doors, with manufacturers thinking that zinc doesn’t corrode.
However an increasing number of door manufacturers and indeed homeowners are now coming to us asking why their zinc handles are corroding, as you can see in the case study video.
The answer is in the base metal. Diecast zinc is very different to zinc galvanising and corrodes quickly because of its composition of multiple elements. As soon as the powder coated surface finish on the handle becomes scratched or damaged, the diecast zinc base metal soon pitts and corrodes.
Why does stainless steel not corrode?
Stainless steel’s corrosion resistance is a result of a very thin film oxide layer on the steel’s surface. This is formed by the alloying agents in the stainless steel, such as chromium and molybdenum, mixing with the oxygen in the water or air to form this thin but stable film of metal oxide. Stainless steel must have at least 10.5% chromium for the passive layer to form. The more chromium and molybdenum that is added, the more stable the passive layer becomes, and the better the corrosion resistance. Note that Molybdenum is only found in 316 Stainless Steel, not 314 Stainless Steel. The Molybdenum is what helps resist corrosion from chlorides such as saline (salt) air or acidic timber.
Our range of blu 316 marine grade stainless steel hardware contains 16 to 18% Chromium and 2 to 3% Molybdenum.
Therefore fitting our blu range of 316 marine grade stainless steel hardware, with their lifetime guarantee will keep your doors and windows looking good, and your customers happy, for years to come.
Three reasons why customers are fitting our KM9 Series Patio Handle to their sliding doors:
Adding value – customers have reported being able to increase their margin, for the same sliding door, after switching to fit the blu KM9 series Patio Handle.
They won’t corrode – made from 316 stainless steel to prevent corrosion and supplied with a Lifetime Guarantee for that extra customer ‘peace of mind’
Strength and Durability – the solid 316 stainless steel backplate provides added strength and durability even for larger leaf sliding doors
So, should you choose handles made from zinc or stainless steel for your front doors, patio doors, windows?
Well if you want a handle that isn’t going to corrode but is going to stay looking and performing great for years to come then it needs to be from our blu stainless steel range.
As the homeowner said after her new blu handles were fitted “Thank you for coming round and for fitting the new handles we are so happy with them”.
You can view the range of BLU 316 Stainless Steel Hardware by clicking on this link.