Electrochemical Corrosion Behavior of SiO<sub>2</sub> Superhydrophobic as Corrosion Inhibitor in Al7075

  1. Jesús Manuel Jáquez-Muñoz
  2. Luis Eduardo Vázquez-Nuñez
  3. Betania Sánchez-Santamaria
  4. José Saúl Arias-Cerón
  5. Jaime Gonzalo Santana-Esquivel
  6. Abel Diaz-Olivearez
  7. Luis Enrique Arambula-Miranda
  8. Martha Guadalupe Carrera Rámirez
  9. Aurora Abigail López-Ibarra
  10. Delfino Cornejo-Monroy
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Abstract

Automotive industry has been employed Al alloys to reduce weight of chassis, however it can present some corrosion problems. In this research we study the electrochemical behavior of SiO2 superhydrophobic on Al 7075. The electrochemical techniques employed were cyclic potentiodynamic polarization (CPP) taken 60 mV/m from -800 to 800 mV vs. OCP and electrochemical impedance spectroscopy (EIS) at ± 10 mV at 10 mHz to 100 kHz based on ASTM G61 and ASTM G106. The electrolytes employed where NaCl and H2SO4 at 3.5 wt.% simulating marine and industrial atmospheras. The results showed that coating presented a efficiency of 81% when is exposed to NaCl, but the corrosion presented in this media is localized; in H2SO4 the corrosion type is uniform.

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  1. Version published to 10.20944/preprints202508.1927.v1