Vibrating electropolishing process in phosphoric acid solution (2nd Report)

Mild steel surface pretreatment using phosphoric acid-inhibitor solution

In this study, a new mild steel surface pretreatment solution is introduced based on phosphoric acid containing a benzimidazole derivative as inhibitor. In this way, three different benzimidazole derivatives namely benzimidazole BI, 2-methyl benzimidazole 2MBI and 2-aminobenzimidazole 2ABI were studied in the 1M H3PO4 using DC and AC electrochemical techniques. Results revealed the better corro...

Solution of the 2nd Homework

First, we introduce some additional notation for the sake of better understanding. In the lecture, we identified the subset of R consisting of constant sequences of rationals with the field of rationals Q via the correspondence Q→ R : r 7→ LIMn→∞ (r,r,r, · · · ) (1) For beginners, however, this identification may come to a source of confusion unless they develop mathematical maturity to some ex...

Effect of Sodium Dodecyl Sulfate on Copper Anodic Dissolution in Phosphoric Acid Solution

In Electrochemical Mechanical Planarization process (ECMP), concentrated phosphoric acid is usually used as electrolyte. Role of sodium dodecyl sulfate (SDS) in anodic dissolution of Cu in concentrated phosphoric acid was studied by Cyclic Voltammetry (CV), inhibition efficiency (IE) calculation and in-situ observation of the Cu electrode surface at anodic overpotentials. It was found that pres...

High frequency sonoluminescence in sulphuric acid and phosphoric acid

Multibubblesonoluminescence (MBSL) emission spectra at different forcing frequencies ( 20, 580, 850 KHz and 1.1 MHz) in Sulphuric acid and Phosphoric acid, under different noble gases atmosphere ( Ar, Xe and He) have been investigated. Using lower frequency we observed the presence of new emissions lines which may indicate the formation of ionized species with very high energy level inside the ...

2nd Year Dphil Report