In the Area of Fixing systems for pipelines or technical building equipment steel is mainly used for holding structures. This affects especially rail systems, pipe clamps and thread connections. To protect these components against rust a sufficient corrosion protection is required. Only because of that systems can be used long term economic and without damages.
Information about environmental conditions, humidity, temperature, air pollution (sulphur or chlorides) as well as salt loading are necessary for choosing the right corrosion protection. The service life should be considered and maybe optical issues becomes important, also.

With TSP®, MEFA offers a comprehensive system of surface protections for a wide range up to the highest corrosive category C5. This means, that support structures can be installed in indoor swimming pools, road tunnels or in the offshore sector without difficulties.

Therefore, you can avoid expensive and difficult to obtain stainless steel constructions in many applications and use approved fixing systems at once.

The protection systems TSP®-3 and TSP®-5 are the core pieces of TSP®.

DIN EN ISO 12944 and DIN EN ISO 14713 MEFA surfaces classified by corrosive categories

The corrosion of metal surfaces depends amongst others on the following factors:
  • Environment (atmosphere, water or earth)
  • Concentration of substances favouring corrosion (sulphur or chlorides)
  • Temperature (increasing temperature causes higher corrosion)
  • Strains during use (e.g. mechanical abrasion)

The overall climate (clime, countryside or industrial areas, urban or coastal area) as well as climatic differences on site (e.g. sunny or shady side respectively weather side, covered or not covered, fluctuating humidity within the interior, local chemical strains) are highly significant for corrosion.

The DIN EN ISO 12944 specifies the corrosive categories. The environmental conditions are classified into six categories from insignificant to highly respectively extreme.

The DIN EN ISO 12944 encompasses the protection of steel parts against corrosion by coating systems. DIN EN ISO 14713 the protection by galvanization.

Both standards contain almost the same corrosive categories.

DIN EN ISO 12944 oder DIN EN ISO 14713 MEFA-Oberflächen nach Korrosivitätskategorien

Die Korrosion auf metallischen Oberflächen hängt unter anderem
von folgenden Faktoren ab:

  • Umgebung: Atmosphäre, Wasser oder Erdreich
  • Konzentration von Korrosionsstimulatoren (z.B. Chloride oder Sulfate)
  • Temperatur: höhere Korrosion bei steigender Temperatur
  • Belastungen während der Nutzung (z.B. mechanischer Abrieb)

Von großer Bedeutung ist hierbei das Gesamtklima (Klimazone, Land oder Industrieatmosphäre, Stadt oder Küste) als auch klimatische Unterschiede vor Ort (z.B. Sonnen oder Schattenseite bzw. Wetterseite, überdacht oder unüberdacht, schwankende Luftfeuchtigkeit im Innenraum, lokale chemische Belastung).

In der DIN EN ISO 12944 sind die Korrosivitätskategorien definiert, welche die Umgebungsbedingungen in sechs verschiedene Kategorien einteilen: von unbedeutend bis sehr stark bzw. extrem.

Die DIN EN ISO 12944 behandelt den Korrosionsschutz von Stahlbauten durch Beschichtungssysteme, die DIN EN ISO 14713 den Korrosionsschutz durch Zinküberzüge.

Beide Normen enthalten die nahezu gleichen Korrosivitätskategorien.