Home         Disclaimer

newlogo.gif (5455 bytes)  

Corrosion Cycle:

The problems arising from short-sighted corrosion control strategies have been particularly well articulated by Joe C. Bowles (a former president of NACE International) in the so-called corrosion cycle. Four phases were identified in this cycle:

Phase 1 - Neglect: Corrosion control is ignored; this may be "tempting" to (poor) management as corrosion problems may not show up immediately. It is easy to be lulled into a false sense of security.

Phase 2 - Panic: The previously hidden corrosion danger becomes apparent, possibly with disastrous financial consequences and safety hazards. It is not easy to combat corrosion rationally and effectively in a state of panic.

(Editor's note: the term "Brownian motion" has been overheard in conversation, as applied to the initial panicky behavior in response to a technical problem).

Phase 3 - Learning Curve: In dealing with the serious corrosion problems, effective corrosion control measures are eventually introduced and failure rates are reduced to manageable levels. Considerable effort (and time) may be required before effective solutions are found, qualified and implemented.

Phase 4 - Unlearning Curve: Once the initial crisis is over, there is a risk that corrosion control will be neglected again and that hard lessons learnt in the past will be forgotten. This is when the corrosion cycle starts all over again, with the neglect stage re-establishing itself.

Numerous senior industry managers are lamenting the fact that the same corrosion problems are appearing over and over again.


Bowles pointed out that the emphasis on short-term profitability in the present business climate increases the risk of becoming trapped in this corrosion cycle.

An investment in corrosion monitoring generally involves longer-term thinking and represents a commitment to rational technical practice for long-term profitability and safety.

Links:
corrosion monitoring - what is it?
basic maintenance strategies.

References/Literature:

J.C. Bowles: "Some Benefits of Long-term Thinking", Pipeline & Gas Journal, March 1997. (published at www.undergroundinfo.com)


A further corrosion cycle, often used in the introduction of corrosion theory, is a thermodynamic cycle.
   

    

© Copyright 2000-2007 M. Tullmin, All Rights Reserved
E-mail: tullmin@sympatico.ca