<p>Corrosion in copper pipes used in air conditioning systems leads to several issues, including refrigerant leaks, decreased equipment efficiency with a consequent reduction in lifespan, and increased energy consumption. This study aimed to develop an algorithm for digital image analysis to identify and evaluate corrosion in copper pipes, allowing for a comparison of corrosive damage effects under different conditions. Copper pipe samples, both unprotected and coated with a mixture of organic varnish and palm oil at a concentration of 150&#xa0;ppm (with inhibition efficiency exceeding 99% as measured by electrochemical impedance and potentiodynamic polarization), were subjected to electrochemical corrosion. Digital image analysis was then performed on the samples before and after exposure to corrosion to observe the color changes on the surface caused by the corrosive process. The results demonstrated significant color changes in the unprotected samples compared to the protected ones. Furthermore, the analysis of color spectra indicated that the samples coated with varnish and palm oil exhibited reduced corrosion effects, as evidenced by minimal color variation. This confirms the efficacy of the palm oil extract in inhibiting corrosion and protecting the copper pipes.</p>

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Evaluation of Palm Oil Corrosion Inhibition Through Image Analysis in Copper Pipes Used in Air Conditioning Systems

  • Marcos Paulo Simões Barbosa,
  • Carmem Célia Francisco do Nascimento,
  • Daniel de Matos Luna dos Santos,
  • Clodomir de Jesus Costa Pereira Junior

摘要

Corrosion in copper pipes used in air conditioning systems leads to several issues, including refrigerant leaks, decreased equipment efficiency with a consequent reduction in lifespan, and increased energy consumption. This study aimed to develop an algorithm for digital image analysis to identify and evaluate corrosion in copper pipes, allowing for a comparison of corrosive damage effects under different conditions. Copper pipe samples, both unprotected and coated with a mixture of organic varnish and palm oil at a concentration of 150 ppm (with inhibition efficiency exceeding 99% as measured by electrochemical impedance and potentiodynamic polarization), were subjected to electrochemical corrosion. Digital image analysis was then performed on the samples before and after exposure to corrosion to observe the color changes on the surface caused by the corrosive process. The results demonstrated significant color changes in the unprotected samples compared to the protected ones. Furthermore, the analysis of color spectra indicated that the samples coated with varnish and palm oil exhibited reduced corrosion effects, as evidenced by minimal color variation. This confirms the efficacy of the palm oil extract in inhibiting corrosion and protecting the copper pipes.