Plant materials as green corrosion inhibitors for select iron alloys: A review

Abstract

The importance of corrosion studies brings to the forefront economic losses, damage, and safety issues of metals deterioration in the construction industry. Although the choice of a material and use of inhibitors can contribute to its resistance to environmental corrosion behavior, the structural deterioration of metals can be exacerbated under operation conditions. In this review, highlights of research findings published in the past five years on the use of plant materials as corrosion inhibitors for variants of steel: carbon steel, mild steel, stainless steel are provided. It elucidates the meaning of green inhibitors and their types. It also presents the methods employed to ascertain the inhibition efficiencies of the plants/plant parts listed and the parameters considered in the corrosion inhibition analyses. The major gaps or limitations identified in the reported research findings include experimentation at constant temperatures and short immersion periods for the alloys. Due to the fact that, if these extracts were to be deployed for industrial use, they'd be subjected to more hazardous conditions, such as higher temperatures, pressures, etc., this paper proposes that their investigations as potential inhibitors on the laboratory/pilot scale be performed at higher temperatures and longer immersion times which may as such provide more comprehensive knowledge on the environmental/climatic requirements for their application. Additional improvement strategies are also suggested. The list of extracts, however, is not exhaustive.

Influence of an emulsion coating on the corrosion resistance of hull plates made of mild steel in natural sea water

“…Influence of a paint, namely Nippon paint SUMO XTRA Durable exterior emulsion , on the corrosion resistance of hull plate made of mild steel in sea water has been investigated by electrochemical methods such as polarization study and AC impedance spectra [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Corrosion resistance of mild steel immersed in simulated concrete pore solution in the presence of sodium potassium tartrate

“…Polarisation study has been used to detect the formation of protective film on the metal surface. When a protective film formed on the metal surface, the linear polarisation resistance (LPR) increases and the corrosion current (I corr ) decreases [13][14][15][16][17][18][19][20][21][22]. The potentiodynamic polarisation curves of mild steel immersed in various test solutions are shown in Figure 2.…”

“…Struktura natrijum-kalijum tartarat 2.3. Electrochemical studiesThe corrosion resistance of mild steel immersed in various test solution has been measured by electrochemical studies such as Polarisation study and AC impedance spectra[13][14][15][16][17][18][19][20][21][22].…”

Influence of dilution and addition of soda water on the corrosion resistance of orthodontic wires immersed in artificial saliva in presence of Copper Barrel, a hard drink

“…Electrochemical studies such as AC impedance spectra have been used to investigate the corrosion resistance of metals and alloys in various environments [10][11][12][13][14][15][16][17][18][19][20].…”