Skip to main content

Coatings quiz - 4

 Coatings quiz - 4


Done? Click here for the next quiz!

Read about the coating delamination in a balcony frame here!



😀Happy learning!😀

Comments

Popular posts from this blog

Resources for a corrosion beginner

Corrosion is a complex subject. It is difficult to pick and choose the starting point. It is very easy to spiral into a confused state of mind if the right resources are not available. Hence, I write this blog post to list out a few books which are great if you are a corrosion enthusiast. Here goes - 1. Corrosion Engineering by Mars. G Fontana          I love this book and I always refer to it for my work. 2. Peabody's control of pipeline corrosion -  3. Corrosion engineering - Principles and practice - Pierre Roberge The website www.corrosion-doctors.org has a more extensive list of corrosion articles. Other than that, there are online corrosion magazines which you can access - 1. Materials performance -  www.materialsperformance.com 2. corrosionpedia.com 3. CORROSION journal  meridian.allenpress.com/corrosion -  it has a few open access articles. Check out these resources as a starting point!

Corrosion in fertilizer industry - 1.2 Elemental sulphur attack

WATCH THE VIDEO HERE OR READ ON BELOW!  Elemental sulphur attack is NOT sulphidation or hydrogen sulphide corrosion. It is an aqueous corrosion phenomenon. It considers two modes -  acidification of sulphur - formation of sulphuric acid 2.      direct cathodic reduction of sulphur with anodic dissolution of iron The lowering of pH is the main source of corrosion in both the methods. The phenomenon is temperature dependent. It increases with increase in temperature and becomes particularly severe above the melting point of sulphur (~112.8 degree Celsius). Hydrogen sulphide present in the petroleum may aggravate the sulphur attack by enhancing uniform pitting corrosion. Monoethylene glycol is used to prevent condensate formation ans may be present in traces in the feedstock petroleum. This enhances the sulphur attack in the form of uniform corrosion, and crevice corrosion. References:  Fang, Haitao, Brown, Bruce, Young, David, and Srdjan Nešic. "Investigation...

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 h...