Posted by: buhayofw | August 5, 2010

Corrosion


As defined in NACE’s Corrosion Basic book, corrosion is “the destruction of a substance (usually a metal) or its properties because of reaction with its environment”

The corrosion process takes place because of the natural tendency of materials, particularly the metal commonly used for structures, tanks, ships and other structures, to revert from the metallic state to the more stable oxide of the metal.

The metal is no longer usable in this condition and if a major metal reversion has taken place, the structure fails. This kind of destruction must therefore be prevented.

Several methods of assuring the continued viability and usability of various structures at a minimum cost may be considered.

1. Select and use specific corrosion-resistant materials for construction

2. Changing or altering the environment

3. Use a barrier between the structural material and the environment (protective coating)

4. Use cathodic protection

5. Use the principal of corrosion allowance or overdesign.

Corrosion is very expensive. In 1995, it is commonly reported in various media that estimated annual losses due to corrosion in th US amounted to more than $48 billion.

Oil companies are investing huge amount of dollar for the coating maintenance of their assets offshore and onshore. Thousands of Corrosion Engineers, Coating Inspectors, Blasters and painters are hired annually to maintain these onshore and offshore structures. Contractors also hire these personnel for the newly constructed structures.

Advertisements

Responses

  1. One effective way to combat corrosion problems is by the use of desiccants like Silica Gel. These are the same small sachets you find in packaging of various products like electronics, garments, etc.

    Silica Gel works by absorbing the moisture in its surrounding area. For most corrosion challenges, it does the job pretty well. Small sachets cost less than a dollar. It truly is a cost effective way of protection from moisture.

    There is a lot more information on our website at http://www.SilicaGel.net


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Categories

%d bloggers like this: