Polypyrrole/Metal Oxides-Based Composites/Nanocomposites for Corrosion Protection

Abstract

Corrosion is of paramount interest to researchers all around the world owing to its disastrous impact on both the economy and people's safety. New strategies based on novel materials have been employed to mitigate corrosion. Conducting polymerbased nanocomposites are a class of materials which have shown promise for corrosion protection. This paper will focus on the specific case of the Conducting polymer-based nanocomposites for corrosion protection, and one important case will be discussed in detail. Corrosion protection offered by Polypyrrole (PPy)/Fe 2 O 3 based composite coating for cold rolled substrate is characterized in this paper by electrochemical impedance spectroscopy and open circuit potential measurements. It was found that PPy/Fe 2 O 3 based composite coating provides better corrosion performance after 40 days exposure to ASTM B117 salt fog test conditions. This improved performance was attributed to the increased surface area of PPy and passivating nature of the composite resulting from the redox activity provided by PPy.

Nanokompozyty na osnowie polipirolu w ochronie metali przed korozją – przegląd literatury

“…chlorkowych (Cl -). Dodatek do PPy nanoczą-stek tlenków metali wpływa na uszczelnienie i ujednolicenie powierzchni powłoki wykonanej z kompozytu PPy-Me X O Y [12][13][14]. Domieszki surfaktantowe [najczęściej używane: sól sodowa kwasu dodecylosiarkowego (SDS), dodecylobenzenosulfonian sodu (SDBS)] mają rozbudowaną strukturę -oba związki zawierają grupę siarczanową oraz przyłączony do niej 12-węglowy "ogon", SDBS ma dodatkowo grupę fenylową, dzięki czemu dodanie tych surfaktantów do kompozytu tworzącego powłokę ochronną poprawia jej przyleganie do chronionej powierzchni [15,16].…”

“…Jadhav i współpr. [12] badali powłoki ochronne wytworzone z ciekłej żywicy epoksydowej (EPON 830), utwardzacza (Epicure 3015), rozpuszczalnika MEK (methyl ethyl ketone -butanon,) oraz pigmentu (Fe 2 O 3 lub Fe 2 O 3 + PPy). Autorzy przeprowadzili testy na skuteczność ochrony przeciwkorozyjnej metodą elektrochemicznej spektroskopii impedancyjnej (EIS) oraz pomiaru potencjału obwodu otwartego (OCP).…”

Electrochemical Synthesis, Characterization and Corrosion Properties of POA−MoO42- Coating in 3.5% NaCl

“…Therefore, to solve these problems, copolymerization of the main monomer with other monomers, stepwise coating or doping with organic and inorganic components (composite coating) have been reported as some of the methods being used. The introduction of composites into the matrix of polymer, alloying is the most optimal way to obtaining polymer coatings with a clear structure, high conductivity and high anti-corrosion properties [16][17][18].…”

Conductive Polymer/SiO2 Composite as an Anticorrosive Coating Against Carbon Dioxide Corrosion of Mild Steel. A Simulation Study

“…For example, one of the comprehensively investigated conductive polymers -polypyrrole (PPy) has a list of important properties such as good electrical conductivity, mechanical and environmental stability for corrosion protection application. Significant progress has been made in the past twenty years toward the application of polypyrrole on corrosion protection of industrial metals [22]. There are lots of traditional ways of protection against degradation of surface; they are based on different mechanisms such as sacrificial protection, barrier-like and active mechanism (for example, using corrosion inhibitors).…”

“…Above mentioned fillers improve the corrosion resistance of composite coatings by reinforcing polymer matrix against diffusion of electroactive species in aggressive medium. Literature analysis suggests that SiO 2 filling within the polymer matrix gives many advantages such as good adhesion, cross-linking, high corrosion and diffusion resistance of the coatings [22,[25][26][27]. Also, the PPy/SiO 2 composite differs with its economic effectiveness, eco-friendly property and high anti corrosivity.…”