Abstract
Polypyrrole (PPy) layers were deposited on lead metallic surface using hydrogen peroxide or benzoyl peroxide as oxidizing agent associated with different types of dopants: phosphoric acid, stearic acid and dodecylbenzene sulfonic acid. Lead alloy was chosen because of its importance in energy industrial application and also because its primary source of extraction is running out, there is an increasingly urgent need to extend its life cycle. For the in situ chemical deposition of PPy, it was considered the combination of only one oxidizing agent and one dopant, being the experiment performed with the combination of these reagents. The morphology and corrosion protection effectiveness of the PPy layer was studied by Scanning Electron Microscope (SEM), Open Circuit Potential (OCP) and Potentiodynamic Polarization. The experimental results demonstrate that PPy layer was effectively formed as a coating layer and Hydrogen Peroxide performed better and consistent protection efficiency when compared to Benzoyl Peroxide.
Highlights
Lead and its alloys have been widely used in many types of industries, from cable sheaths to radiation shielding and it is still a major raw material in the automotive battery industry
We studied the influence of the oxidizing agent and its influence among the PPy chemical deposition process on lead alloy surface
Following are the micrographs of the lead alloy discs covered with the PPy layer chemically deposited with two different oxidizing agents
Summary
Lead and its alloys have been widely used in many types of industries, from cable sheaths to radiation shielding and it is still a major raw material in the automotive battery industry. The corrosion protection of metals and alloys by using conducting polymer coating has been emerged as a feasible alternative and have revolutionized material science as they can be used in single parts or deposited in finely homogeneous layers, assuming the required shape regardless of geometry, easy and generate gain without increasing the efficiency of the electric current. PPy has high stability, it is easy to polymerize by chemical or electrochemical process and it can be synthesized in aqueous medium containing various electrolytes, which can be incorporated into the polymer chain and modify the conductive properties of the film (Tallman De et al, 2002). Chemical deposition of the PPy polymer was performed in situ on the metallic substrate using a one-step process that is relatively controllable from the combination of oxidizing and doping agents’ solutions. The effective performance of the deposited layers was evaluated using the electrochemical analysis open circuit potential (OCP) and Potentiodynamic Polarization
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
