Corrosion on Brigde

Corrosion Protection

Without durable and functional corrosion protection many steel structures within a few years are snookered. But not only the appearance is impaired, the static can be affected. In the worst case, then remains only the choice between demolition and total reconstruction.

Cost effective corrosion protection of structural steelwork should present little difficulty for common applications and environments if the factors that affect durability are recognised at the outset.

There are many steel structures that have continued in use satisfactorily for many years even in adverse conditions. The first major iron structure, the bridge in Coalbrookdale UK, has survived over 200 years whilst the Forth rail bridge over 100 years old is legendary. Today, modern durable protective coatings are available which, when used appropriately, allow extended maintenance intervals and improved performance.

The key to success lies in recognising the corrosivity of the environment to which the structure will be exposed and in defining clear and appropriate coating specifications. Where steel is in a dry heated interior environment the risk of corrosion is insignificant and no protective coating is necessary. Conversely, a steel structure exposed to an aggressive environment needs to be protected with a high performance treatment and may need to be designed with maintenance in mind if extended life is required.

The optimum protection treatment, which combines appropriate surface preparation, suitable coating materials, required durability and minimum cost, is achievable using modern surface treatment technology.

 

The specification of the environmental conditions are laid down in DIN EN ISO 12944-2 for ambient atmospheric conditions (C1-C5) and for water and soil corrosivity (Im1-Im3) (see tables).
To meet the requirements of these categories with a coating system, the respective minimum thickness to be achieved. The ideal structure of the coating will vary depending on substrate (mild steel to galvanized steel). To the proposed paint quality not intended primarily for corrosion protection but corresponds experience, in most cases with the relevant requirements. Decisive here are often the optical requirements such as durability of pigmentation and degree of gloss depending on the weather influence.

 
Klasse Korrosivitäts-Kategorie
Beispiele
Schicht- dicke

Lackqualität

Im1
Fresh Water
River works, water power plants
200 µm outdoor, highly wheather resistant/ ship's laq
Im2
marine or brackish water
Harbor areas with steel structures, sluice gates, piers, offshore facilities
240 µm Outdoor, highly wheather resistant/ ship's laq
Im3
Soil
Container in ground, sheet piling, steel pipes
240 µm outdoor weather resistant

Suche

Contact:

Lackierzentrum Reichenbach GmbH
Zwickauer Straße 225
08468 Reichenbach
Tel: 03765 / 3090 850
Fax: 03765 / 3090 860

Mails:

Sara Grasnick - CEO
Dipl. Ing. Marlies Schöber - Sales
Andre Kästner - Quality Assurance

zertifiziert nach

DIN EN 9100
(Luft- und Raumfahrt)

seit 2015

 

zertifiziert nach DIN/ISO-9001:2008 von 2004 - 2017