Skip to main content

Corrosion in fertilizer industry - Part 1.1

The fertilizer industry is as complex as any other industry in terms of corrosion.

Its corrosion issues begin from the storage area itself.

There are four major areas that need to be looked at from the corrosion point of view -

  1. Production
  2. Storage
  3. Transportation
  4. Field application

In the production stage, there are a few sub-steps.


The first step begins with desulphurization.

The motive is to remove the sulphur.

This sulphur is present in the feedstock, which is the raw material to make the hydrogen for ammonium.

The feedstock is petroleum and sulphur is an impurity. Along with this, there may be some produced water as well.

This petroleum is stored in tanks made of carbon steel.

It is transported to the process through carbon steel pipelines.

Carbon steel is said to have less severe corrosion due to elemental sulphur.

This corrosion due to elemental sulphur has mechanisms different from sulphidation and hydrogen sulphide corrosion.


Watch the video for a detailed explanation



Click here for PART 1.2!




😀Happy learning!😀

Comments

Popular posts from this blog

Types of MARINE corrosion

Types of MARINE corrosion The marine environment is one of the most corrosive environments.  Its corrosivity is due to the ionic concentration of the seas and oceans, temperature variations, wind velocities, depth of the sea, and biological elements. As a result, the corrosion on marine structures such as ships, FPSO, and offshore platforms, appears in multiple forms. Hence, it is important to learn about the basic types of corrosion as applicable to the marine environment. Some of these types of corrosion in a marine environment are - Uniform corrosion due to sodium, magnesium, and calcium salts Uniform corrosion is characterized by the removal of the material all over the surface. It leads to thinning of the walls. Pitting in active-passive alloys such as aluminium Active-passive alloys have a thin oxide film on the surface. A small break due to the chlorides in the seawater allows the penetration of the water and ions, leading to pit formation. Crevice corrosion in fixtures and ...

CAREER OPTIONS IN CORROSION

  CAREER OPTIONS IN CORROSION The first time I studied corrosion was in 2009. The last 14 years have taught me one important thing - The path of a career in corrosion is not as straightforward as we are led to believe. Whether we are starting as a student of corrosion, or are entering the field after working as a non-corrosion person, there is always some career pathway that we are not aware of. There are research projects, certifications , audits, inspections , etc. EveryEng gave me the opportunity to share my learnings about the possible options in the field of corrosion . If you are someone who is starting or wants to switch to/between corrosion and its related fields, here is a short presentation for you! https://www.everyeng.com/mentor/course/view/3559864f 😀 Happy learning! 😀

The drain mystery

I recently moved to a new house. As expected, there was a lot of cleaning up to do. One of the tasks was the cleaning of the washbasin. Usually, the drain is a circular part with  5 to 6 holes for the water to flow out. What I saw was this - I have not had a chance to analyse the material of the drain. However, a quick search tells me that this is most probably stainless steel. The water that this drain is exposed to is the bore water. Thus, the drain has encountered a lot of chlorides. There is general as well as localized corrosion. The damage started off as a simple process of pitting. Pitting due to chlorides is one of the most common headaches for poor stainless steel. They break the passive oxide film, and reach the underlying fresh iron. This iron then reacts with the usual suspects (ions, oxygen, water) and forms what we see as the rust. As can be seen in the picture, the thin sections of the drain between the holes have disappeared in three places. This may have h...