High efficient corrosion inhibitor of water‐soluble polypyrrole–sulfonated melamine formaldehyde nanocomposites for 316 L stainless steel

Abstract

In this work, new water-soluble polypyrrole-sulfonated melamine formaldehyde nanocomposites (PPy-SMF NCs) were first synthesized by one-step insitu polymerization of pyrrole with FeCl 3 in the presence of various mole ratios of sulfonated melamine formaldehyde (SMF). The characterization of the PPy-SMF NCs was investigated via ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray, dynamic light scattering, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, and conductivity measurements. The resulting PPy-SMF NCs were proved to improve the solubility, electrical properties, and thermal stability. The anticorrosion performance of PPy-SMF NCs on 316 L stainless steel (316 L SS) was examined using electrochemical impedance spectroscopy, potentiodynamic polarization, and weight-loss method. The result showed that the PPy-SMF NCs acts as a mixed-type inhibitor, as well as a protective layer to 316 L SS against corrosion in 3.5% NaCl solution. The Langmuir adsorption isotherm was well fitted and suitable to explain the adsorption behavior of the PPy-SMF NCs on 316 L SS surface. The inhibition efficiency of PPy-SMF NCs is 99% by the weight-loss method which could be attributed to the protective layer formed on 316 L SS surface by the adsorption of PPy-SMF NCs.

Enhanced Electrochemical and Corrosion Behavior of Amorphous 316-type Stainless Steel Microfibers in Saline Environment

“…In another study, ZrN thin lm coating by unbalanced magnetron sputtering on 304 SS increased the passivation behavior by at least 100 times relative to bare 304 SS by looking at the decrease in the corrosion current density 11 . Besides, titanizing 12 , gamma-alumina 13 , zirconia 14,15 , titanium boron nitride thin lms 16 , WO 3 nano akes coated with TiO 2 nanoparticles 17 , borate glass 18 , amorphous boron 19 , amorphous hybrid silane reinforced with ZnO 20 , FeCo 2 O 4 nanowire arrays 21 , polypyrrole-sulfonated melamine formaldehyde nanocomposites 22 , polypyrrole doped with dodecylbenzenesulphonic acid 23 , polypyrrole-Al 2 O 3 composite 24 , poly(vinylcarbazole)/alumina nanocomposite 25 , polyterthiophene 26 , polyaniline and its derivatives 27 , superhydrophobic electroactive epoxy 28 , polyaniline-graphene oxide 29 , nickel hydroxide-graphene oxide 30 , carbon nanotube/nano ber 31 , organic-inorganic hybrid sol-gel silica 32 are coated on 316 series stainless steels to improve their performance for a range of applications.…”

Enhanced Electrochemical and Corrosion Behavior of Amorphous 316-Type Stainless Steel Microfibers in Saline Environment

“…In another study, ZrN thin lm coating by unbalanced magnetron sputtering on 304 SS increased the passivation behavior by at least 100 times relative to bare 304 SS by looking at the decrease in the corrosion current density 11 . Besides, titanizing 12 , gamma-alumina 13 , zirconia 14,15 , titanium boron nitride thin lms 16 , WO 3 nano akes coated with TiO 2 nanoparticles 17 , borate glass 18 , amorphous boron 19 , amorphous hybrid silane reinforced with ZnO 20 , FeCo 2 O 4 nanowire arrays 21 , polypyrrole-sulfonated melamine formaldehyde nanocomposites 22 , polypyrrole doped with dodecylbenzenesulphonic acid 23 , polypyrrole-Al 2 O 3 composite 24 , poly(vinylcarbazole)/alumina nanocomposite 25 , polyterthiophene 26 , polyaniline and its derivatives 27 , superhydrophobic electroactive epoxy 28 , polyaniline-graphene oxide 29 , nickel hydroxide-graphene oxide 30 , carbon nanotube/nano ber 31 , organic-inorganic hybrid sol-gel silica 32 are coated on 316 series stainless steels to improve their performance for a range of applications.…”

Selenious acid‐doped polyaniline synthesis and characterization by chemical oxidative solid‐state polymerization of aniline with SeO2 as an oxidizing agent

“…PANI is an intrinsically conducting polymer and has a variety of potential applications in rechargeable batteries, 1 electromagnetic interference shielding, 2 nonlinear optics, 3 catalysts, 4 membranes, 5 solar cells, 6 light-emitting devices, 7 sensors and indicators, 8 supercapacitors, 9 defluorination [10][11][12] and corrosion inhibitors. 13 In general, PANI can be produced through the chemical or electrochemical polymerization of aniline. The electrochemical method has the advantage of allowing simple control of the morphology and electrical properties; however, mass production is challenging.…”

“…One of the most attractive, simple, cost‐effective, chemically stable and easily synthesizable conducting polymers is polyaniline (PANI). PANI is an intrinsically conducting polymer and has a variety of potential applications in rechargeable batteries, 1 electromagnetic interference shielding, 2 nonlinear optics, 3 catalysts, 4 membranes, 5 solar cells, 6 light‐emitting devices, 7 sensors and indicators, 8 supercapacitors, 9 defluorination 10–12 and corrosion inhibitors 13 . In general, PANI can be produced through the chemical or electrochemical polymerization of aniline.…”