V2A stainless steel (1.4301)
Contrary to conventional wisdom, even stainless steel can corrode. Base metals (e.g. in dust or chip form) on stainless steel surfaces cause contact corrosion and form “rust spots”. Regular cleaning must be ensured when in contact with de-icing salt. AISI no 1.4301 (V2A) is used for our stainless steel edges and gratings as standard. Stainless steel gratings made of AISI no 1.4404 (V4A) can also be supplied for an additional charge.
Galvanised steel
Steel parts in the channel systems are coated in a protective zinc coating. To ensure permanent corrosion protection, this layer must be protected against mechanical damage and chemical attacks. Contact with calcium-rich or cementitious substances (screed, etc.) can destroy or dissolve the protective zinc coating. Condensed water also attacks the protective layer to form white rust (corrosion of the zinc coating) – this is not a defect. Edges of galvanised channel bodies and covers that are cut on site must be treated with a suitable corrosion protection agent
PLEASE NOTE: Galvanised channel elements must not be laid on fresh lime or cement mortar and not grouted with acetic silicone in order to prevent increased corrosion.
