Special Issue "Green and Sustainable Corrosion Inhibitor Materials"

Dear Colleagues,

The deterioration of metallic substrates because of corrosion is a serious challenge to the oil and gas, desalination, automotive, and chemical industries, as well as to cooling water systems. Annual costs of corrosion and its consequences are estimated in the region of 3–5 % of GDP for developed countries of the world. The most common, practical and cost-effective means of controlling this scourge is the use of corrosion inhibitors. The use of organic compounds as corrosion inhibitors dates back to the 1950s, when it was first introduced to the petroleum industry and later to the concrete industry in the early 1990s. Though many synthetic compounds showed good anticorrosive activity, the main concern is immediately related to their toxicity. The use of toxic organic and inorganic chemicals as corrosion inhibitors has been limited by many environmental regulators because of their threat to both human beings and the environment. These toxic effects have led to the use of anticorrosion materials that are eco-friendly and harmless. In recent times, an increasing number of studies have focused on environmentally friendly and sustainable corrosion inhibitors, which are promising alternatives to toxic corrosion inhibitors, in order to control corrosion damage in diverse corrosive environments. These materials range from plant extracts to amino acids, ionic liquids, and natural/carbohydrate polymers.

This Special Issue aims at covering recent progress and advances made in mitigating corrosion in diverse corrosive environments, including but not limited to acidic, neutral, basic, sweet corrosion (CO₂ corrosion), sour corrosion (H₂S corrosion), concrete pore solution, and microbial influenced corrosion (MIC) for different kinds of metals (ferrous and non-ferrous) using green and sustainable corrosion inhibitor materials.

We encourage academic and industry researchers to submit high quality original research articles, case studies, reviews, critical perspectives, and viewpoint articles on the use of environmentally friendly and sustainable corrosion inhibitor materials for the control of corrosion in diverse corrosive environments. These may include but are not limited to acid cleaning and descaling, pickling and oil well acidization operations, sweet corrosion, sour corrosion, microbial influenced corrosion (MIC), etc. The materials of interest include, but are not limited to, the following:

• plant extracts;
• Natural/Carbohydrate Polymers and derivatives;
• Amino acids;
• Ionic Liquids;

Dr. Saviour A. Umoren
Dr. Moses M. Solomon
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sustainability is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• green corrosion inhibitors
• corrosion inhibition
• acid corrosion
• sweet corrosion
• sour corrosion
• concrete pore solution
• plant extracts
• amino acids
• ionic liquids
• natural polymers
• microbial influenced corrosion
• metals

Type of Paper：       Research Article

In-situ Electrochemical Corrosion Reticence Monitoring of Polyvinyl Alcohol g-Histidine on Mild Steel Corrosion and its Theoretical Studies

Ali Fathima Sabirneeza. A¹, Menaka. R² and Subhashini. S¹

Abstract

The graft polymer poly vinyl alcohol g-histidine (PVAH) was prepared using ammonium persulphate with a grafting percentage of about 95%.  The corrosion inhibition functioning of PVAH towards mild steel in molar hydrochloric acid was studied by the in-situ electrochemical monitoring techniques such as potentiodynamic polarization studies (Tafel), linear polarization studies (LPR) and electrochemical impedance spectroscopy (EIS). The in-situ upshot of inhibitor concentrations, inhibition time and temperature has been investigated. The corrosion rate, inhibition efficiency and other parameters were evaluated for different inhibitor concentrations. The thermodynamic parameters and activated energies calculated from the PDP studies depicted the spontaneous adsorption of the graft polymer. The results showed excellent reticence effect of the graft polymer PVAH towards mild steel corrosion by acting as a mixed type inhibitor. Gaussian 9 software was used to calculate the energies of HOMO and LUMO which are associated with the electron donating ability of inhibitor molecule and the ability of the molecule to accept electron. The surface of the mild steel was analyzed using Atomic force microscopy (AFM) and Laser profilometry techniques. The results of the surface analytical techniques confirmed the adsorption of PVAH over the mild steel there by reticence the corrosion in the acid medium.