Green Recycling of Poly(ethylene terephthalate) Waste as Corrosion Inhibitor for Steel in Marine Environment

Abstract

Green recycling of poly(ethylene terephthalate) plastic waste, in this respect, PET waste was subjected to de polymerization process with tri methylene glycol (1,3-propandiol) in the presence of manganese acetate (1.0 % w/w to the total Wight of the reactants) as trans esterification catalyst, the product is Bis-(3-hydroxy-propyl)-terephthalate, BHPT, as a non-ionic surfactant was separated and characterized by FT-IR and 1 HNMR and evaluated as corrosion inhibitor for carbon steel alloy in artificial marine environment using chemical and electrochemical techniques. Effect of inhibitor concentrations and reaction temperature were studied. The chemical techniques used in this work are gravimetric, thermometric and atomic absorption spectroscopy(AAS), whereas the electrochemical techniques are open circuit potential, potentiodynamic polarization. The corrosion inhibition efficiency increases with increasing inhibitor concentrations and decreased by rising temperature. The maximum corrosion inhibition efficiency 96.5% was afforded using 300 ppm of the used inhibitor derived from plastic waste. Potentiodynamic polarization curves indicate that the used system act as mixed inhibitor. The data of AAS show that the iron(iii) ions Fe +3 concentrations were decreased by increasing inhibitor concentration. All the used techniques are in good agreement to each other (±2 %) and shows that the used drug acts as green corrosion inhibitors for steel in marine environment.

Manufacturing of Corrosion Inhibitors and Flow Improvers from Recycling of Waste at Hail City, Saudi Arabia: Physicochemical and Electrochemical Studies on Steel in Petroleum Industries

“…With the increase of civil civilization, the daily production of plastic materials increases, as well as the daily consumption of plastic materials, which may result in the accumulation of plastic waste on a daily basis. Plastic bottle production in the world exceeds 200 million tons per year, accounting for approximately 19% of total solid waste accumulated in the environment. − Many researchers have worked hard to convert solid and plastic waste into useful chemicals for industrial purposes. − Plastic waste was recycled, and its products were used as flow improvers for local petroleum raw materials and as metal corrosion inhibitors in the petroleum industry. Metal corrosion in the petroleum industry is a constant problem that occurs in oil depots, pipelines, boilers, and tankers due to the fact that the raw materials and petroleum products contain corrosive ions such as sulfates, chlorides, and nitrates in addition to containing a percentage of water that is often mixed with petroleum crude.…”

“…SAPIC iron protection was performed recently, 2022, using tryptophan and histidine acting as a mixed inhibitor due to their adsorption on the iron surface, obeying the Langmuir isotherm model . A series of reported works aimed to reduce environmental pollution by converting plastic waste into useful products, as well as to assess the inhibition action of plastic waste on the corrosion of some steel alloys in various aqueous media. − The use of plastic waste as corrosion inhibitors includes the synthesis of new compounds with new structural properties from PET in order to improve their efficiencies in the field of corrosion protection of steel. A surfactant inhibitor derived from waste has numerous advantages, including high inhibition efficiency, low cost, low toxicity, availability, renewability, and ease of production. − R. S. Abdel-Hameed reviewed the scientific efforts in the field of using plastic waste as green corrosion inhibitors toward metals in 2016 when he collected and summarized his studies and other scientist’s studies in a review article published in the Indian Journal of Materials Science .…”

“…A series of reported works aimed to reduce environmental pollution by converting plastic waste into useful products, as well as to assess the inhibition action of plastic waste on the corrosion of some steel alloys in various aqueous media. − The use of plastic waste as corrosion inhibitors includes the synthesis of new compounds with new structural properties from PET in order to improve their efficiencies in the field of corrosion protection of steel. A surfactant inhibitor derived from waste has numerous advantages, including high inhibition efficiency, low cost, low toxicity, availability, renewability, and ease of production. − R. S. Abdel-Hameed reviewed the scientific efforts in the field of using plastic waste as green corrosion inhibitors toward metals in 2016 when he collected and summarized his studies and other scientist’s studies in a review article published in the Indian Journal of Materials Science . Atta et al, 2007, studied the corrosion inhibition effect of two oligomers derived from the glycolysis products of poly­(ethylene terephthalate) (PET) with diethanol and triethanol amines, which was measured from weight loss and electrochemical polarization techniques.…”

“…Corrosion inhibitors are substances that are added in very small quantities for limiting the corrosion process by either inhibiting the anode or cathode reactions or both. − Corrosion inhibitors contain effective functional groups that enable them to be adsorbed on the metal surface such as hydroxyl and amine groups, as well as oxygen, nitrogen, sulfur, and heterocyclic materials. Organic and inorganic materials have been used as metal corrosion inhibitors in acidic, alkaline, and saline corrosive media and marine environments. − Environmental waste is recycled, and the results of recycling are used as metal corrosion inhibitors, whereas the waste of PET and PEAA plastics is recycled, and the recycled products are used as corrosion inhibitors for carbon steel used in the petroleum industry in acidic media and marine environments. − The surfactant materials prepared from plastic waste had an effective activity in adsorption on the surface of metals and protection of metals from corrosion, − as well as expired drugs were used as inhibitors. − Polymeric materials and heterocyclic compounds − were used to protect metals from corrosion. Corrosion of metals is a pervasive process related to the industry and to the daily use of metals in the environment.…”

Surface-modified magnetite nanoparticles using polyethylene terephthalate waste derivatives for oil spill remediation

“…The use of these solid wastes to yield beneficial materials would have a dramatically positive effect on reducing solid waste. PET was reused to produce materials for different applications, including oil spill absorbers, 2 oil spill dispersants, 3 corrosion inhibitors, 4,5 azo dyestuff, 6 and electrochemical sensors. 7,8 Different PET-based amphiphilic compounds were prepared and employed in our earlier works to demulsify heavy crude oil emulsions.…”