Investigation of triazole derived Schiff bases as corrosion inhibitors for mild steel in hydrochloric acid medium

Abstract

3,5-Diamino-1,2,4-triazole Schiff base derivatives and their inhibition efficiency, based on the effect of changing functional groups, were reported to establish a relationship between inhibitor efficiency and molecular structure using weight loss method, electrochemical and Fourier transform infrared spectral techniques. It was found that the molecules containing more electron donating groups have higher inhibition efficiency than the corresponding compounds with low electron donating groups.The results indicate that the order of inhibition efficiency of the triazole and its Schiff bases in solution and the extent of their tendency to adsorb on mild steel surfaces are as follows: vanilidine 3,5-diamino-1,2,4-triazole [ furfuraldine 3,5-diamino-1,2,4-triazole [ anisalidine 3,5-diamino-1,2, 4-triazole [ 3,5-diamino-1,2,4-triazole.

Inhibiting Effects of Rabeprazole Sulfide on the Corrosion of Mild Steel in Acidic Chloride Solution

“…The negative values of Δ ads indicate the spontaneous adsorption of RS on mild steel surface [22]. Also the high values of ads suggest the strong adsorption ability of RS on mild steel surface.…”

Studies on the inhibition of carbon steel corrosion in hydrochloric acid solution by expired Carvedilol drug

“…Also, it is noticed that b a and b c were not affected and the Tafel lines are parallel, denoting that the inhibiting effect of this drug has arisen by merely blocking of the available surface area via adsorption, i.e. the tested drug reduced the anodic dissolution and hydrogen evolution without changing the reaction mechanism (34). The shift of the E corr values is not more than 85 mV (34 mV); hence, the studied drug may be classified as a mixed-type inhibitor.…”

The thiazole and triazole derivatives as inhibitors of metal corrosion: Part I

“…U daljem radu Quraishi [31] proučava inhibitorske osobine i drugih derivata triazol-tiola: 4-amino-5-fenil-4H-1,2,4,-triazol-3-tiola (APTT), 4-amino-5-(2-hidroksi)fenil-4H-1,2,4,-triazol-3-tiola, (AHPTT), 4-amino-5-stiril-4H-1,2,4,-triazol-3-tiola, (ASTT), na koroziju mekog čelika u 1 mol dm -3 HCl. Mogućnost zaštite čelika od korozije u HCl proučava, takođe, Hui-Long Wang primenom metil, etil i fenil derivata merkapto-triazola [32], Gopi primenom: vanilidin, furfuliden i anislidin derivata-3,5-diamino-1,2,4-triazola [33], Ouici [34] ispituje inhibitorske osobine: 5-(2-metoksifenil)-1,2,4-triazol-3-tiona (2MTT) i 5-(3-metoksifenil)-1,2,4-triazol-3-tiona (3MTT), dok Desai [35] proučava hidrosibenzotriazol i 3-(piperazin-1-il)benzol(d)isotiazol u istoj sredini kao i K.R Ansari [36] koji ispituje efekat 4-amino-5-(piridin-4-il)-4H-1,2,4-triazol-3-tiola (APTT) na koroziono ponašanje mekog čelika 1 mol dm -3 HCl. U svim navedenim radovima autori se pretežno fokusiraju na određivanje zavisnosti inhibitorske efikasnosti od primenjene koncentracije ispitivanih jedinjenja, uticaja prisutnog supstituenta i radne temperature na efikasnost, kao i na pronalaženju odgovarajuće adsorpcione izoteme.…”