Corrosion inhibition of steel in phosphoric acid

AbstractPhosphoric acid has been used in many industrial applications and can be in contact with a lot chemical and petrochemical equipment. Most of this equipment is made of steel alloys that may be damaged because of contact with acid. Corrosion inhibitors can be used for to protect steel alloys against several forms and various environments of corrosion. In this paper, the efficiency and applications of organic and inorganic inhibitors in different environments of phosphoric acid are investigated. More than 40 papers were collected and reviewed. Surveys of the stated works in phosphoric acid environments are documented. It was concluded that organic inhibitors performed as good corrosion inhibitors and are used widely. The use of inorganic inhibitors was limited. Most of studied inhibitors follow Langmuir’s adsorption isotherm, and the mechanism of the inhibition can be ascribed to the mixed effect on cathodic and anodic reactions. The synergistic effect was also addressed in the present work.

Download Full-text

A Review on Plants and Biomass Wastes as Organic Green Corrosion Inhibitors for Mild Steel in Acidic Environment

Metals ◽

10.3390/met11071062 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1062

Author(s):

Norbaayah Ahmad Reza ◽

Nor Hasrul Akhmal ◽

Nor Akmal Fadil ◽

Mohd Firdaus Mohd Taib

Keyword(s):

Acid Solution ◽

Natural Resources ◽

Metal Surfaces ◽

Corrosion Inhibitors ◽

Acid Corrosion ◽

Protective Layer ◽

Acid Environment ◽

Organic Inhibitors ◽

Organic Corrosion Inhibitors ◽

Green Corrosion Inhibitors

Acid corrosion is a problem pertaining to corrosion that involves an acid solution. It is important to treat metal to preserve its integrity. Thus, acids are utilized to clean and treat metal surfaces. In return, this may lead to over-etching and metal degradation. Corrosion inhibitors were introduced as a solution for the issue. However, there are some problems associated with the usage of conventional corrosion inhibitors. Traces of nitrites and chromates that are present in the inhibitors may lead to serious health and environmental issues. As a solution, organic green corrosion inhibitors have been studied to replace the conventional corrosion inhibitors. These inhibitor molecules form a protective layer on top of the metal surface to suppress metal dissolution when added to the acid solution. This process prevents direct contact between the metal surfaces and the acid environment. This study explores the usage of natural resources and biomass wastes as the basis for organic green corrosion inhibitors. This study also provides some suggestions for new biomass wastes that can be studied as new organic corrosion inhibitors, and it is aimed at opening the perspective of researchers on exploring new organic inhibitors by using natural resources and biomass wastes.

Download Full-text

Synthesis and Study of 1-Alkenyl-2-propargyloxy-3-aminomethylbenzenes as Acid Corrosion Inhibitors and Antimicrobial Additives to Cutting Fluids

Russian Journal of Applied Chemistry ◽

10.1134/s1070427220110026 ◽

2020 ◽

Vol 93 (11) ◽

pp. 1638-1645

Author(s):

M. R. Bayramov ◽

G. M. Askarova ◽

G. M. Mehdiyeva ◽

M. A. Agayeva ◽

I. G. Mammadov ◽

...

Keyword(s):

Corrosion Inhibitors ◽

Acid Corrosion ◽

Cutting Fluids

Download Full-text

Anti-Corrosive Effect of Jordanian-Bay- Leaves Aqueous Extract on Mild Steel in 1.0 M Hydrochloric Acid Solution

WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT ◽

10.37394/232015.2021.17.59 ◽

2021 ◽

Vol 17 ◽

pp. 614-618

Author(s):

Nawal H. Bahtiti ◽

Ibrahim Abdel-Rahaman

Keyword(s):

Hydrochloric Acid ◽

Adsorption Isotherm ◽

Aqueous Extract ◽

Corrosion Inhibitors ◽

Polarization Technique ◽

Corrosive Effect ◽

The Impact ◽

Natural Inhibitors ◽

Temkin Adsorption Isotherm ◽

Hcl Solution

Natural inhibitors are the most crucial manner to lessen the corrosion price of various business metals. There are several strategies being used with corrosion inhibitors. One technique being used is the Electrochemical strategies. The gain with this technique is their brief size time and mechanistic information. It is beneficial in the corrosion's layout safety techniques besides the layout of the brand new inhibitors, there are 3 styles of corrosion inhibitors as anodic inhibitors, cathodic inhibitors, over one inhibitor. The corrosion inhibition of slight metallic in 1.0 M HCl solution with the aid of using Jordanian -Bay- leaves extract has been studied with the use of potentiodynamic polarization technique. Results received a display that Bay- leaves aqueous extract behaves as an anodic inhibitor for slight metallic in 1.0 M HCl solution. The inhibitor capabilities thru adsorption following Temkin adsorption isotherm. The impact of parameters like temperature and inhibitor awareness at the corrosion of slight metallic has additionally been studied.

Download Full-text

N-Phenacylpyridinium Bromides as Acid Corrosion Inhibitors

Russian Journal of Applied Chemistry ◽

10.1023/b:rjac.0000044159.65275.47 ◽

2004 ◽

Vol 77 (7) ◽

pp. 1117-1120 ◽

Cited By ~ 1

Author(s):

R. I. Yurchenko ◽

I. S. Pogrebova ◽

T. N. Pilipenko ◽

T. E. Shubina

Keyword(s):

Corrosion Inhibitors ◽

Acid Corrosion

Download Full-text

A new class of acid corrosion inhibitors: 2-hydroxy-3-(2-undecyl, pentadecyl or heptadecyl amido-ethylamino) propane-1-tri-ethyl ammonium hydroxides

Corrosion Science ◽

10.1016/s0010-938x(79)80088-8 ◽

1979 ◽

Vol 19 (7) ◽

pp. 983-989

Author(s):

S.M. Gawish ◽

P. Kirkov ◽

A.A.B. Hazzaa ◽

B. El-Din Gebril

Keyword(s):

Corrosion Inhibitors ◽

Acid Corrosion ◽

New Class

Download Full-text

Self-generated peroxyacetic acid in phosphoric acid plus hydrogen peroxide pretreatment mediated lignocellulose deconstruction and delignification

Biotechnology for Biofuels ◽

10.1186/s13068-021-02075-w ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Dong Tian ◽

Yiyi Chen ◽

Fei Shen ◽

Maoyuan Luo ◽

Mei Huang ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Acetic Acid ◽

Synergistic Effect ◽

Phosphoric Acid ◽

Wheat Straw ◽

Lignin Degradation ◽

Acid Oxidation ◽

Main Function ◽

Corn Stalk ◽

Peroxyacetic Acid

Abstract Background Peroxyacetic acid involved chemical pretreatment is effective in lignocellulose deconstruction and oxidation. However, these peroxyacetic acid are usually artificially added. Our previous work has shown that the newly developed PHP pretreatment (phosphoric acid plus hydrogen peroxide) is promising in lignocellulose biomass fractionation through an aggressive oxidation process, while the information about the synergistic effect between H3PO4 and H2O2 is quite lack, especially whether some strong oxidant intermediates is existed. In this work, we reported the PHP pretreatment system could self-generate peroxyacetic acid oxidant, which mediated the overall lignocellulose deconstruction, and hemicellulose/lignin degradation. Results The PHP pretreatment profile on wheat straw and corn stalk were investigated. The pathways/mechanisms of peroxyacetic acid mediated-PHP pretreatment were elucidated through tracing the structural changes of each component. Results showed that hemicellulose was almost completely solubilized and removed, corresponding to about 87.0% cellulose recovery with high digestibility. Rather high degrees of delignification of 83.5% and 90.0% were achieved for wheat straw and corn stalk, respectively, with the aid of peroxyacetic acid oxidation. A clearly positive correlation was found between the concentration of peroxyacetic acid and the extent of lignocellulose deconstruction. Peroxyacetic acid was mainly self-generated through H2O2 oxidation of acetic acid that was produced from hemicellulose deacetylation and lignin degradation. The self-generated peroxyacetic acid then further contributed to lignocellulose deconstruction and delignification. Conclusions The synergistic effect of H3PO4 and H2O2 in the PHP solvent system could efficiently deconstruct wheat straw and corn stalk lignocellulose through an oxidation-mediated process. The main function of H3PO4 was to deconstruct biomass recalcitrance and degrade hemicellulose through acid hydrolysis, while the function of H2O2 was to facilitate the formation of peroxyacetic acid. Peroxyacetic acid with stronger oxidation ability was generated through the reaction between H2O2 and acetic acid, which was released from xylan and lignin oxidation/degradation. This work elucidated the generation and function of peroxyacetic acid in the PHP pretreatment system, and also provide useful information to tailor peroxide-involved pretreatment routes, especially at acidic conditions. Graphical abstract

Download Full-text

Corrosion inhibition of some azole derivatives on carbon steel in hydrochloric acid solution

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-05-2013-1266 ◽

2014 ◽

Vol 61 (5) ◽

pp. 300-306 ◽

Cited By ~ 6

Author(s):

B.P. Markhali ◽

R. Naderi ◽

M. Sayebani ◽

M. Mahdavian

Keyword(s):

Carbon Steel ◽

Hydrochloric Acid ◽

Organic Compounds ◽

Corrosion Inhibitors ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Acid Corrosion ◽

Molecular Structures ◽

Inhibition Mechanism ◽

Content Type

Purpose – The purpose of this paper is investigate the inhibition efficiency of three similar bi-cyclic organic compounds, namely, benzimidazole (BI), benzotriazole (BTAH) and benzothiazole (BTH) on carbon steel in 1 M hydrochloric acid (HCl) solution. Organic inhibitors are widely used to protect metals in acidic media. Among abundant suggestions for acid corrosion inhibitors, azole compounds have gained attention. Design/methodology/approach – The inhibition efficiency of the three organic compounds was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Findings – Superiorities of BTH and BTAH corrosion inhibitors were shown by EIS data and polarization curves. Moreover, the results revealed that BTAH and BTH can function as effective mixed-type adsorptive inhibitors, whereas no inhibition behavior was observed for BI. Both BTAH and BTH obeyed Longmuir adsorption isotherm. The results obtained from this isotherm showed that both inhibitors adsorbed on the specimen surface physically and chemically. The difference in inhibition efficiencies of BTAH, BTH and BI was related to the presence of nitrogen and sulfur hetero atoms on their molecular structures. Originality/value – This study evaluated inhibition efficiency of BI, BTAH and BTH using electrochemical methods. In addition, the study attempted to find inhibition mechanism of the inhibitors and to find modes of adsorption of the inhibitors, correlating effects of heteroatoms and inhibition efficiency.

Download Full-text

Effect of Organic Corrosion Inhibitors on Corrosion Fatigue

CORROSION ◽

10.5006/0010-9312-23.3.65 ◽

1967 ◽

Vol 23 (3) ◽

pp. 65-71 ◽

Cited By ~ 1

Author(s):

PARVIZ MEHDIZADEH ◽

R. L. McGLASSON ◽

J. E. LANDERS

Keyword(s):

Corrosion Fatigue ◽

Diesel Fuel ◽

Corrosion Inhibitors ◽

Fatigue Cracks ◽

Material Surface ◽

Significant Protection ◽

Inhibitor Concentration ◽

Degree Of Protection ◽

Organic Inhibitors ◽

Organic Corrosion Inhibitors

Abstract The effect of organic inhibitors on corrosion fatigue performance of steel in a mixture of brine containing H2S-CO2 and diesel fuel is reported. The inhibitor concentration required to give significant protection to steel under corrosion fatigue conditions is much higher than that for corrosion control. This is due to the fact that corrosion fatigue cracks initiated at incompletely protected spots on the material surface influence fatigue failure regardless of the degree of protection achieved on neighboring areas. Effects of fatigue stress and concentration of corrosion inhibitors were investigated. Results were analyzed in terms of the proposed mechanism for corrosion inhibition in these environments.

Download Full-text