Thesis flowchart…aka…How to decide what to write first in your thesis?

It was that moment in my thesis writing when I had received a terrible feedback and was asked to overhaul the entire document. It was time to take a break from the screen and go back to basics. I printed out my document and went home. Then I took a break that evening, because it is one of the most underrated but essential things to get everything into perspective.

The next day I proceeded to lay out the pages of my thesis chapter-wise on the table. Then I took a blank paper and pad. I thought, “How will I explain my work to my family members in my native language?” So I decided to write down my work in my native language in the form of an algorithm and then rearrange my thesis.

I answered the following questions to do so –

  1. What is the issue?
  2. Where is it encountered?
  3. Is it very common?
  4. What makes it so very important?
  5. What are the steps that people have already taken to solve it?
  6. Why have they not been that effective?
  7. What is it that I did to solve the issue?
  8. How did I do it?
  9. What were the exact steps that I followed?
  10. What did I observe?
  11. How were these observations different or similar to what the literature states?
  12. What did I learn?
  13. What will I do in future?

Put the answers to these questions in the form of a flowchart.

NOW, Are you ready to test your corrosion knowledge? 

Click here for the first quiz!

😀Happy learning!😀

Electrochemical testing – 2 – What is a reference electrode?

What is a reference electrode?

A reference electrode is used as a scale to measure the potential of the working electrode.

Reversible reactions

Just as a scale is unchanging, the potential and chemical conditions of the reference electrode should also be unchanging.

Thus, it is necessary that the reactions – oxidation and reduction –  occurring inside a reference electrode are reversible. This ensures constant chemistry.

No polarization

It also ensures that there is no net polarization as both reactions occur simultaneously at different points in the reference electrode. this keeps its potential constant.

Thus, the potential of any working electrode connected to this reference electrode will be dependent only on the conditions of the working electrode. This makes it easier to note the changes happening in the working electrode.

Check out the video for a detailed explanation

Done? Click here for Part 1 and PART 3!

NOW, Are you ready to test your corrosion knowledge? 

Click here for the first quiz!

For concise and focussed courses, check out the website below!

Abbreviation day – EN 50125-1 Standard for Railways

 EN 50125-1 Standard for Railways

🔴 With so many short forms used in our work all around, it gets confusing and it is also not possible to remember/know all of them. So here’s something new.

🔴 I will take up one short form/standard name and describe in a couple of lines what it is. Some of you may be familiar with some of the common ones.

Today it is 📌 EN 50125-1 📌

🔴 EN stands for European standards.

🔴 EN 50125-1 is the standard used in railways to determine if the equipment (material, design) is compatible with the environmental conditions in Europe.

🔴Simply put, if you are in charge of design and manufacturing of a railway part, you have to look at this standard to see the environmental condition in the area of operation of the train.

🔴 The selection of the material, design, surface treatments, have to be then decided depending on how severe the environment is (sunny/cold/wind/snow etc.)

Check out the free corrosion quizzes here!

😀Happy learning!😀

Coupon test for corrosion inhibitors


  • Coupon test is used to gauge a material’s corrosion rate in a corrosive environment.
  • It is also used to test the efficiency of corrosion inhibitors.


  • Material – The coupons are made from the same or similar material as that of the actual component
  • Electrolyte – The electrolyte for exposure is the same or similar to the actual environment. Sometimes, coupons are placed in the actual environment with the component, for example in the soil with submerged pipelines.


  1. Clean the coupon of any oil/grease/rust
  2. Measure the weight of original coupon – W
  3. Measure the Area of coupon to be exposed – A.
  4. Take photographs and/or optical micrographs of the coupon
  5. Immerse the coupon in the electrolyte without inhibitor
  6. Note the time of measurement – t. This is decided by the concerned parties or as per the standards followed.
  7. Take out the coupon after the time.
  8. Take photographs and/or optical micrographs of the coupon
  9. Clean the corrosion products off the coupon. DO NOT USE ROUGH POLISHING as it can remove the underlying pits and surface as well.
  10. Take photographs and/or optical micrographs of the coupon.
  11. Measure the final weight of the coupon again – Wf

To test the efficiency of an inhibitor, add the inhibitor to the electrolyte and then use a DIFFERENT COUPON.  Follow the above steps again.
Weight loss Wo = Original weight W – final Weight Wf

corrosion rate C.R = weight loss W / Area A* time of exposure t

degree of surface coverage θ = (corrosion rate C.Ro without inhibitor– corrosion rate with inhibitor C.Rinhi) / corrosion rate without inhibitor C.Ro

inhibition efficiency (Einhi%) = (corrosion rate C.Ro without inhibitor– corrosion rate with inhibitor C.Rinhi) * 100 / corrosion rate without inhibitor C.Ro

For standard samples with the same Area A and time of exposure t, the C.R may be changed to weight loss W.

Watch the video here for detailed explanation!

😀Happy learning!😀