 |
|
|
|
|
|
 The ZT Alloy
Environmental concerns prompted research into alternative coating compositions and after 7 years of testing Follansbee have perfected their ZT alloy. This tin/zinc alloy has been
shown in both laboratory and field tests to have improved corrosion resistance, particularly in marine atmospheres. Samples have been exposed to 2400 hours of salt spray testing, and
5 years of exposure to industrial and marine atmospheres, with no evidence of corrosion.
Over 5 Years of beach front conditions |
The durability of a coating depends on its corrosion resistance,
thickness and adherence to the metal substrate. The ZT coating has
been proved to have excellent corrosion resistance and TCS II has a
thick 20 micron coating on both sides. Follansbee's hot dip coating
technology produces a pore free coating that diffuses into the
stainless steel to produce a unique inter-metallic zone, where the
coating diffuses into the stainless steel, that guarantees excellent
adherence.
Samples undergoing corrosion testing |
Tests by Ove Arup on TCS II have confirmed that the ZT coating averages
20 microns per side and is uniform, continuous, with no evidence of
porosity. They confirmed the presence of the intermetallic
layer, and that this and the anodic nature of
the coating protects the substrate even where the
coating has been damaged. Corrosion testing
showed that the stainless substrate pays no part in
the corrosion resistance of TCS II and confirmed that
the product was suitable for use in all atmospheric
conditions, even in aggressive coastal atmospheres.
|
|
|
| << Previous Next >> |
|
|
|
|
