Corrosion Inhibition Effect and Adsorption Activities of methanolic myrrh extract for Cu in 2 M HNO3

Corrosion resistance of Gold 21K alloy immersed in artificial sweat in the absence and presence of 100 ppm of urea and also 100 ppm of D-Glucose has been investigated by polarization study and AC impedance spectra. It is observed that Corrosion resistance of Gold 21K alloy immersed in artificial sweat in the presence of 100 ppm of urea / D-Glucose increases. Hence it is concluded that people wearing ornaments made of Gold 21K alloy need not worry about the excess of urea / D-Glucose in their sweat. When Gold 21K alloy is immersed in artificial sweat in the presence of 100 ppm of urea, Linear Polarisation Resistance value increases from 103389Ohmcm2 to 123437Ohmcm2 ; corrosion current decreases from 4.036 x10-7A/cm2 to 3.308 x10-7A/cm2 ; charge transfer resistance value increases from 10490 Ohmcm2 to 14070 Ohmcm2 ; impedance value increases from 4.253 to 4.324; double layer capacitance decreases from 4.862x10-10 F/cm2 to 3.625x10-10 F/cm2 , and phase angle increases from 38.91 to 70.14. When Gold 21K alloy is immersed in artificial sweat in the presence of 100 ppm of D-Glucose, Linear Polarisation Resistance value increases from 103389Ohmcm2 to 4817257Ohmcm2 ; corrosion current decreases from 4.036 x10-7A/cm2 to 0.161x10-7A/cm2 ; charge transfer resistance increases from 10490Ohmcm2 to 33300Ohmcm2 ; impedance value increases from 4.253 to 4.977; double layer capacitance decreases from 4.862x10-10 F/cm2 to 1.5315x10-10 F/cm2 , and phase angle increases from 38.91° to 79.74°.

Section: Resultsmentioning

confidence: 99%

Influence of urea and glucose on corrosion resistance of Gold 21K alloy in the presence of artificial sweat

Umamathi¹,

Parimalam²,

Prathipa³

et al. 2022

“…The influence of a paint, namely Nippon paint, weatherbond advance, on the corrosion resistance of hull plate made of mild steel in seawater has been investigated by electrochemical methods such as polarization study and AC impedance spectra [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Resultsmentioning

confidence: 99%

Influence of a paint coating on the corrosion of hull plates made of mild steel in natural seawater

Kavipriya¹,

Lurdu²,

Bhuvaneswari³

et al. 2022

The corrosion resistance of mild steel (used to make hull plates in ship technology) in seawater before paint coating (Nippon paint, weatherbond advance) and after paint coating has been measured by electrochemical studies such as Polarisation study and AC impedance spectra. It is observed that after paint coating, the corrosion resistance of mild steel hull plates increases. Polarization study reveals that after paint coating, the linear polarization resistance increases and corrosion current decreases. AC impedance spectra reveal that in the presence of paint coating charge transfer resistance value increases, impedance value increases, phase angle increases and double layer capacitance value decreases.

“…Inhibition of corrosion of L80 alloy pipeline carrying simulated oil well water by succinic acid has been evaluated by exlectrochemical studies such as polarization study and AC impedance spectra (EIS) [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Resultsmentioning

confidence: 99%

Inhibition of corrosion of L 80 alloy pipeline carrying simulated oil well water by succinic acid

Krishnaveni¹,

Anitha²,

Velkannan³

et al. 2022

Simulated oil well water (SOWW) is conceded out by pipelines made of several alloys, for instance mild steel L80. These alloys may simulated oil well water undergo corrosion owing to presence of various aggressive ions present in SOWW. To prevent this several inhibitors have been used. Inhibition of corrosion of L80 alloy pipeline carrying simulated oil well water by succinic acid has been evaluated by electrochemical studies such as polarization study and AC impedance spectra (EIS). Polarisation study reveals that in the presence of inhibitor linear polarization resistance increases and corrosion current decreases. AC impedance spectra reveal that in presence of succinic acid, RT value increases, impedance value increases, phase angle increases and Cdl value decreases. The present study reveals that when succinic acid is added to simulated oil well water, the corrosion resistance of L80 alloy increases. It implies that succinic acid may be added to simulated oil well water flowing through pipe line made of L80 alloy.