Wednesday, 18 November 2015

CORROSION ENGINEERING

CORROSION ENGINEERING

We are all engineering professional and I am sure that you have nice information about corrosion engineering, then why we need to write and study this article?  

Corrosion is like a poison for the health of our machinery as it will kill the properties of engineering materials or components after few time of working, if we have not taken the precaution against corrosion.

One day my friend was talking about one case of an accident in his organization and investigation carried out to figure out the root cause of accident. Can you imagine, what was the root cause? It was corrosion. I felt to start this discussion, based on the corrosion engineering, because it will not only damage the service life of our component but also in some cases it may harm the people also.

Also deal with Root Cause Analysis


This article will provide the basic of corrosion engineering and engineering materials that may suffer from corrosion. We will also study various problems due to corrosion in association with this article. This article will also deals with the process to prevent the corrosion and also the various engineering component failure due to the phenomena of corrosion.

So, let us come to the point without wasting your time

We are selecting power plant for studying the effect of corrosion and we will discuss the corrosion failure over two important unit of power plant i.e. boiler and heat ex-changer and we will study the corrosion effect, corrosion failure and reason behind corrosion and other reason of failure of above two units (heat ex-changer and Boiler) also.

Introduction to corrosion

Corrosion is basically the depreciation of materials due to electrochemical reactions with its environment. Corrosion is occasionally also used to the deterioration of concrete, plastics and wood, but we normally used corrosion for metals only.

Figure : Corrosion phenomena

Corrosion is basically a normal and also a natural procedure. We must understand that corrosion could not be completely prevented, but yes we can reduce the effect of corrosion i.e. corrosion could be reduced or controlled by suitable selection of material, coatings, design and sometimes by altering the environment. Different types of non-metallic and metallic coatings are used regularly to assure the metal parts free from corrosion effect.

Corrosion consist the reaction between a metallic material and its environment and is a natural Procedure in a sense that metal is trying to revert to the chemically combined state wherein it will be almost always found in the earth’s crust.

Therefore corrosion is a process that might be normally assumed to occur, it should not be regarded as impending, we must understand that controlling and prevention of corrosion is quite possible by different types of process that we will discuss very soon in this literature review report on corrosion. Corrosion consist the various reactions and all reactions causing the corrosion effect will be in the category of electrochemical reactions. 

So we could not avoid the corrosion to be present but we can control the corrosion by controlling the reasons that produces the corrosion so we may say corrosion controlling depends on the skills of the design engineer because it is the section of corrosion prevention specialist.

The rusting effect on simple mild steel is the best and most common type of corrosion effect and overall assembles to a higher portion of the whole cost associated to corrosion.

 
We have seen various corrosion effects over simple mild steel where the complete metal surface will be exposed and attacked by electrochemical reactions and causing corrosion and such activity of corrosion will lead the failure of the engineering component and will destroy the complete machinery after little time  if care not given to reduce the effect of corrosion.

We will discuss few engineering components that may suffer from corrosion and we will also study the failure analysis of that engineering component that was basically caused due to corrosion.

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