Inhibition of Carbon Steel Corrosion in 1 M H2SO4 Using Soy Polymer and Polyvinylpyrrolidone

Abstract

The inhibition of carbon steel corrosion induced in 1 M H 2 SO 4 by soy polymer (SP) from an extract of Glycine Mac-L and polyvinylpyrrolidone (PVP) respectively was investigated at 30-60 °C using hydrogen gas evolution, potentiodynamic polarization and quantum chemical computation technique respectively. Results obtained from hydrogen gas evolution technique revealed that SP and PVP respectively acted as an inhibitor for corrosion of carbon steel in 1 M H 2 SO 4 solution. The increase in inhibition efficiency (IE%) of SP and PVP reached a maximum at 89.5% and 84.36% respectively, and the increment was found to be dependent on inhibitor concentration. The combination of mixture of SP and PVP as single inhibitor showed better inhibition improvement compared to individual inhibitor. Temperature study reveals that inhibition efficiency decreased with a rise in temperature suggesting physical adsorption. The computed parameters for the activation energies and heat of adsorption of the corrosion process supported the physical adsorption mechanism proposed. Regression analysis (adsorption isotherm model) was used to approximate the adsorption characteristics of the SP and PVP. Polarization data revealed that SP and PVP respectively adsorption acted as a mixed type inhibitor and also affected the anodic and cathodic partial reactions process. Quantum chemical computations were performed using the density functional theory to establish a clear link existing between the effectiveness of the inhibitor and its electronic properties.

Adsorption and Corrosion Inhibition Properties of Butanolic Extract of Elaeoselinum thapsioides and Its Synergistic Effect with Reutera lutea (Desf.) Maires (Apiaceae) on A283 carbon Steel in Hydrochloric Acid Solution

“…Metals and alloys are extensively utilized in various applications in industries field due to their admirable physical properties and affordability in the economy [1]. However, the exposition to aggressive environments during long-term service, these materials tend to lose their corrosion resistance ability, which leads to the deterioration of their surfaces and affecting their durability causing serious economic losses and pollution of the environment [2,3]. In order to mitigation corrosion problems, several methods were adopted such as coating, anodic protection and the use of inhibitors [4].…”

Newbouldia laevis Leaves Extract as Tenable Eco-Friendly Corrosion Inhibitor for Aluminium Alloy AA7075-T7351 in 1 M HCl Corrosive Environment: Gravimetric, Electrochemical and Thermodynamic Studies

“…AA7075-T7351 dissolution) and the reductive, cathodic reaction (i.e. hydrogen evolution) [39,51]. The negative overpotentials are − 220, − 232, − 242 and − 253 mV for 100, 200, 500 and 1000 mg/L NBL respectively, and suggested a cathode-type corrosion inhibition domination.…”

“…at 338 K). The lower inhibition efficiency, at 338 K, might be attributed to the acquisition of higher dissolution energy by the corrosive agents inherent in the environment and/or due to more vigorous effervescence, as a result of more hydrogen evolution [39]. This proves that an AA7075-T7351-NBL complex barrier [38] was formed on the surfaces of AA7075-T7351 coupons, through the adsorption of NBL molecules, thereby protecting them from the 1 M HCl corrosive environment, at all temperatures.…”

Tin corrosion inhibition by molybdate ions in 0.2 M maleic acid solution: Electrochemical and surface analytical study

“…Such a result corroborates that found by Ait Addi et al 25 in synthesized industrial water. On the other hand, Nwanonenyi et al 4 contributed the high rate of dissolution of carbon steel in 1 M H2SO4 solution observed at elevated temperature to more dissolution energy effect acquired by the corrosive agent within the aggressive medium. Also, the desorption of adsorbed inhibitor due to enhanced solution agitation by higher rates of hydrogen gas evolution at elevated temperature is possible.…”

“…The consequences of metallic component failures related to corrosion are many and include the followings injuries, death, material loss, contamination and pollution, loss of time, mechanical and structural damage, etc. 4 .…”