The choice of surface treatment for the products should be made based on the conditions on the site. MEKA® product names include a code to indicate their surface treatment, e.g. KS20-200 L=6000 PG.
Plastic
White or colored plastic
Atmospheric- Corrosivity Category
C1–C2
Standard
–
Plastic products are made of through-dyed plastic granules, by either injection molding or extrusion. Plastic products are not surface-treated after manufacture.
M
Paint-coated product
Colour white RAL 9010
Atmospheric- Corrosivity Category
C1–C2
Standard
EN 10169
(steel products)
Paint-coated products may be e.g.
■ Pre-galvanised and painted steel products
■ Steel or aluminium products that have been painted or powder coated after manufacture
Polyester paint is used on steel and aluminium products, as its weather, corrosion and wear resistance properties are good.
B
Paint-coated product
Colour black RAL 9005
Atmospheric- Corrosivity Category
C1–C2
Standard
EN 10169
(steel products)
Paint-coated products may be e.g.
■ Pre-galvanised and painted steel products
■ Steel or aluminium products that have been painted or powder coated after manufacture
Polyester paint is used on steel and aluminium products, as its weather, corrosion and wear resistance properties are good.
AD
Anodised aluminium
Standard colour natural grey EN000
Atmospheric- Corrosivity Category
C1–C2
Standard
–
Anodised aluminium products are made of pre-anodised aluminium preform sheets, or the anodisation is applied to the final product. A protective oxide layers has been generated on the surface of anodised aluminium with anodising solution and an electrical current. This results in a hard surface that is resistant to wear.
AL
Aluminium
Atmospheric- Corrosivity Category
C1–C2
Standard
EN 573-3
Aluminium products are made of aluminium alloy with an extrusion machine. The products are not surface-treated separately after being manufactured.
EG
Steel, galvanised after manufacture
Atmospheric- Corrosivity Category
C1–C2
Standard
EN ISO 2081
Zinc layer strength on average 5-8µm
Electro-galvanised products are made of non-surface-treated steel. The final product, such as a whole wire mesh tray or an attaching part thereof is pre-treated and galvanised in an electrolytic basin. The zinc layer covers all surfaces of the product, including cutting surfaces and welding seams.
PG
Pre-galvanised
steel
Atmospheric- Corrosivity Category
C1–C2
Standard
EN 10346
Zinc layer strength on average 20µm
Pre-galvanised steel products are made of steel that is already galvanised. These products may also be called pre-galvanised, continuously galvanised or Sendzimir-galvanised.
HDG
Steel that has been dipped in molten zinc after manufacture (dip-galvanised)
Atmospheric- Corrosivity Category
C1–C4
Standard
EN ISO 1461
Zinc layer strength on average 45-55µm
Hot-dip galvanised products are made of non-surface treated steel. The final product, such as a whole cable tray or an attaching part thereof is pre-treated and dipped in molten zinc. These products may also be called dip-galvanised. The zinc layer covers all surfaces of the product, including cutting surfaces and welding seams.
XPG®
Hot-dip galvanized, specially coated steel
Atmospheric- Corrosivity Category
C1–C4
Standard
EN 10346
XPG products are made of zinc-based special alloy coated steel. The special mixture forms a thin and tight film on the coating, which improves corrosion protection. Corrosion protection is based on cathodic and mechanical protection.
HST
Acid-proof steel
AISI 316L
Atmospheric- Corrosivity Category
C1–CX
Standard
EN 10088
Acid-proof steel products (HST) are made of acid-proof steel. Welded products are pickled after manufacture.
Corrosion Classification – EN ISO 12944
The standard SFS-EN ISO 12944-2 describes the corrosion classifications and zinc corrosion in these classes. The usage applications (indoors and outdoors) presented on this page are only for guidance. Every products applicability should be confirmed case by case basis. If you have any questions, please don´t hesitate to contact us.
Outdoors
Not for
outdoor use.
Indoors
Heated buildings
with a clean atmosphere, e.g. offices, schools and hotels.
Zinc Thickness Loss
≤ 0,1 µm per year
Recommended Surface Treatment
M, B, EG, PG
Outdoors
Atmospheres with a low level of pollution: mostly rural areas.
Indoors
Unheated buildings with a possibility for condensation, e.g. warehouses and sports halls.
Zinc Thickness Loss
> 0,1–0,7 µm per year
Recommended Surface Treatment
M, B, EG, PG
Outdoors
Industrial areas and coastal areas with moderate salinity.
Indoors
Production areas with high humidity and some atmospheric impurities, e.g. food product manufacturing plants.
Zinc Thickness Loss
> 0,7–2,1 µm per year
Recommended Surface Treatment
HDG, XPG®
Outdoors
Industrial areas and coastal areas with moderate salinity
Indoors
Chemical plants, swimming pools, coastal ship and boatyards.
Zinc Thickness Loss
> 2,1–4,2 µm per year
Recommended Surface Treatment
HDG, XPG®
Outdoors
Industrial areas with high humidity and aggressive atmosphere, and coastal areas with high salinity
Indoors
Buildings with almost permanent condensation and with high pollution
Zinc Thickness Loss
> 4,2–8,4 µm per year
Recommended Surface Treatment
HST
Outdoors
Offshore areas with high salinity, industrial areas with extreme humidity, and aggressive atmospheres, sub-tropical or tropical atmospheres.
Indoors
Industrial buildings with extreme humidity and aggressive atmosphere.
Zinc Thickness Loss
> 8,4–25 µm per year
Recommended Surface Treatment
HST
Product Groups by Atmospheric-Corrosivity Category
Cable Trunking
INSTAL®
INFORM®
Socket Poles
INSTAL®
Feeder Poles
INSTAL®
Cable Ladders
KS20 K PG
KS20 PG
KS60 PG
Cable Trays
KRA M / PG
KRB M / PG
Wire Mesh Trays
WMT EG
Lighting Support Rails MEK 70 S M / PG
MEK 70 K PG
AluMEK
Fastening Parts
M / EG / PG
Cable Ladders
KS20 HDG
KS60 HDG
KS80 HDG
KS80 SP2.0 HDG
KSE80 HDG
KSF80 HDG
Wire Mesh Trays
WMT HDG
Lighting Support Rails
MEK 70 K XPG
Fastening Parts
HDG / XPG®
Cable Ladders
KS20 HDG
KS60 HDG
KS80 HDG
KS80 SP2.0 HDG
KSE80 HDG
KSF80 HDG
Wire Mesh Trays
WMT HDG
Lighting Support Rails
MEK 70 K XPG
Fastening Parts
HDG / XPG®
Cable Ladders
HST KS80
HST KSE80
HST KSF80
HST KS20
Wire Mesh Trays
WMT HST
Lighting Support Rails
HST MEK 70
Fastening Parts
HST
Cable Ladders
HST KS80
HST KSE80
HST KSF80
HST KS20
Wire Mesh Trays
WMT HST
Lighting Support Rails
HST MEK 70
Fastening Parts
HST
