Inhibition of Corrosion of Carbon Steel in Sea Water by Sodium Gluconate - Zn2+ System

Abstract

The inhibition efficiency of sodium gluconate (SG)-Zn 2+ system in controlling corrosion of carbon steel in sea water has been evaluated by weight-loss method. The formulation consisting of 250 ppm of SG and 75 ppm of Zn 2+ has 98% IE. Influence of duration of immersion on the IE of SG-Zn 2+ has been evaluated. The mechanistic aspects of corrosion inhibition have been investigated by polarization study and AC impedance spectra. The protective film has been analysed by FTIR and luminescence spectra. The surface morphology and the roughness of the metal surface have been analysed by atomic force microscopy. The protective film consists of Fe 2+ -SG complex and Zn(OH) 2 . It is found to be UV -fluorescent.

Corrosion Behaviour of 18 Carat Gold in Ringer Solutions in the Presence of Sodium Chloride and Glucose

“…Corrosion resistance of 18 carat gold in simulated Ringer's solution and lactated Ringer's solution has been measured by polarization study and AC impedance spectra 13,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] An increase in corrosion resistance results in increase in LPR value, decrease in corrosion current, increase in charge transfer resistance, increase in impedance value and decrease in Cdl value.…”

“…The lactated Ringer solution comprised of 6.0 g L -1 NaCl, 0.3 g L -1 KCl, 0.2 g L -1 CaCl2 and 3.1 g L -1 sodium lactate. [6][7][8]11 Corrosion behaviour of 18…”

“…Surface properties and anti-corrosion characteristics are the most important material characteristics determining the biofunctionality of all implant materials. 18 Carat gold has been a valuable biomaterial for manufacturing implants due to its unique properties such as shape memory effect, super elasticity and good mechanical properties. [1][2][3][4] Many devices such as stent, orthodontic wires and root canal files have been used clinically.…”

The effect of CeCl3 inhibitor on the localized corrosion of stainless steel in chloride solutions

“…Research has also been conducted involving the use of corrosion inhibitors in seawater environment. Rajendran et al investigated the inhibition of the corrosion of carbon steel in seawater by both sodium molybdate–Zn 2+ and sodium gluconate–Zn 2+ . In recent years research has been more focused on the investigation of ecological inhibitors.…”

Experimental and Theoretical Study on Corrosion Inhibition of Mild Steel in Oilfield Formation Water Using Some Schiff Base Metal Complexes

“…In any case, a good protective film formed on the metal surface as a result of absorption which it isolates the metal sur-face from aggressive media [8][9][10]. Several papers investigated the chemical adsorption and formation a protective film which consists of Fe 2+ -Ligand complex and M(OH) 2 causes by metal complexes [11][12][13]. The metals are formed coordinate-covalent bonds with compounds containing heteroatoms such as O, N, S which have free electron pairs [14].…”