WHAT IS CORROSION PREVENTION?
Corrosion Prevention of reinforced concrete structures is an increasingly important method of repairing and protecting spalling concrete, damaged bridges, steel framed buildings, harbours, wharves and other structures.
It can also be applied to protect new structures, applying corrosion prevention techniques, to ensure the problem does not occur in the first place.
Corrosion is probably the single most serious cause of deterioration of reinforced concrete structures. Buildings and bridges are suffering from corrosion because of contamination by de-icing salt, sea salt and salts cast into the concrete and the carbonation of concrete. A Dept of Transport report has shown that over half a billion pounds worth of corrosion prevention is necessary in the future to preserve the motorway and trunk road system in England and Wales. The Highways Agency has recently endorsed the use of corrosion prevention methods utilising cathodic protection, realkalisation, chloride extraction, corrosion inhibitors and other similar techniques. Comparable problems exist on other reinforced concrete structures all over the world.
These well proven methods are technically sound solutions because they deal with the corrosion problem across the entire area treated. This cannot be achieved with conventional repair methods without removing all the concrete where salt or carbon dioxide has penetrated. Such extensive repair is frequently prohibitive in terms of practicality and cost.
Corrosion prevention is often the most economical solution when compared with conventional concrete removal and repair. When applying corrosion prevention techniques to existing structures all that is additionally required is some cosmetic patching to repair cracks and areas where concrete has broken away.
Corrosion prevention and protection systems have been successfully installed on a wide range of reinforced concrete structures. These include bridge decks and support structures, wharves and other harbour structures, tunnels, water towers and other containment vessels, commercial and residential buildings. Installations have been carried out in North America, the United Kingdom, Europe, the Middle and the Far East and Australasia.
Click here to download CPA Technical Notes publications on technology, basic principles, history and benefit of using corrosion prevention techniques
STRUCTURAL CONCRETE ALLIANCE DEMONSTRATION DAY 2017The first Structural Concrete Alliance practical demonstration day of 2017 will be held on the 10th May 2017. For more information please Click here
CPD SEMINAR PROGRAMME 2017
The Structural Concrete Alliance seminar programme will begin on Tuesday 28th March 2017 at Bristol. For further information regarding the 2017 programme Click here
CORROSION TESTING OF CONCRETE STRUCTURES
This is a concise summary of the most commonly used corrosion testing techniques for reinforced and pre-stressed concrete structures. To download Click here
GLOSSARY OF TERMS 'A FOR ANODE'
A brief description of terms likely to be encountered in discussions about corrosion and in cathodic protection of steel in concrete is available to download from the CPA website. Click here
CONTINUITY AND SHORTS IN ELECTROCHEMICAL TREATMENTS
Electrochemical treatments are extensively used to treat corrosion-damaged concrete. These include impressed current and galvanic cathodic protection, chloride extraction, re-alkalisation, and hybrid treatments using a temporary power supply. To read more and download the Technical Note Click here
IMPRESSED CURRENT ANODES FOR THE CATHODIC PROTECTION OF ATMOSPHERICALLY EXPOSED REINFORCED CONCRETE
Impressed current cathodic protection is widely used to provide corrosion control on reinforced concrete structures suffering from reinforcement corrosion. It is also applied to early 20th century steel framed masonry and brick clad buildings and monuments.. To download the Technical note Click here
A key objective of the Corrosion Prevention Association is to identify, quantify and communicate the principles and benefits of corrosion prevention to those having an influence or an interest in the design, construction, use, maintenance, preservation and investment in reinforced concrete buildings and structures.