The Influence of TMPSi Post-treatment on the Corrosion Resistance Behavior of TMPSi Pre-treated Anodized Aluminum: Chara
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The Influence of TMPSi Post‑treatment on the Corrosion Resistance Behavior of TMPSi Pre‑treated Anodized Aluminum: Characterization and Mechanism Bahareh Javanpour1 · Maziyar Azadbeh1 · Mahdi Mozammel1 Received: 23 February 2020 / Accepted: 24 April 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In the current study, the silane layers are fabricated, assisting Trimethoxy(propyl)silane (TMPSi) precursor. As the single TMPSi-treated anodized surface revealed promising quality but not an ideal one, TMPSi double treatment through the sol– gel route was considered to enhance the superficial, and electrochemical properties of the anodized substrate. The general characterizations of the synthesized double TMPSi layer were conducted by X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), and Scanning Electron Microscopy (SEM). Physical features including roughness and, wettability also were measured to highlight the effect of the double TMPSi layer on the topography of the surface. Moreover, the electrochemical performance of the double treated layer was evaluated by Open Circuit Potential (OCP) and Electrochemical Impedance Spectroscopy (EIS). Although the roughness and wettability were very similar to those of single TMPSi-treated anodized surface, the double TMPSi-treated layer showed dramatic improvement in corrosion resistance. Rt was increased up to 665.62 kΩ by creating a double TMPSi layer, which demonstrates excellent corrosion protection. Keywords Anodized aluminum · Trimethoxy(propyl)silane (TMPSi) · Sol–gel · Double silane treatment · Electrochemical performance
1 Introduction Aluminum and its alloys have remarkable industrial and scientific value on account of their rare features, including high resistivity to wear and lightweight [1]. These unique metallic components hold a chemically reactive nature, which leads to forming an adhesive oxide on the surface. Nevertheless, formed oxide has limitations in particular environments (e.g., chlorine media). That susceptibility restrains their use in the offshores, structural applications, aircraft, and automobiles [2]. Hence, Treatments have been implemented to enhance their productivity in continues systems, to expand * Bahareh Javanpour [email protected] Maziyar Azadbeh [email protected] Mahdi Mozammel [email protected] 1
Faculty of Materials Engineering, Sahand University of Technology, Sahand New Town, Tabriz, Iran
their life-cycle [1, 3]. Nowadays, the platform is regarded as a distinct field, and indispensable research subject [4]. Chromate base conversion coating developed noticeable corrosion protection for aluminum substrate. The major drawback of this method was releasing the hazardous substance (Cr(VI)) to the environment. Therefore, researchers decided to find an environmentally friendly substitute for this purpose [5]. Numerous methods have been accomplished to present different commercial products such as; plain oxide or composite coatings [6]. Silane treatment has attracted p
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