Citrus paradisi and Cymbopogon distillates were admixed in ratio 1:1 and assessed for their inhibition effect on Cu-Ni cupronickel alloy in 0.25 M H₂SO₄–3.5% NaCl electrolyte. Results revealed the distillates effectively inhibited the Cu-Ni alloy at 2–5% CPC concentrations. The degradation rate of Cu-Ni alloy without distillate is 0.373 mm/y whereas at 1% concentration, the degradation rate decreased to 0.140 mm/y (1.37 × 10⁻⁵ A/cm²) corresponding to inhibition efficiency of 62.46%. At 2–5% concentration, inhibition efficiency ranged between 80.47 and 95.58%. The distillate displayed mixed-type inhibition performance coupled with significant suppression of cathodic reduction reactions. Thermodynamic calculations showed the distillates adsorbed unto the Cu-Ni alloy by chemisorption according to Langmuir and Freundlich adsorption isotherms (correlation coefficients above 0.8). Gibbs free energy indicate increase lateral attraction effect among the distillate molecules with respect to #concentration. Open circuit potential curves showed the distillates increased the thermodynamic instability of Cu despite effective inhibition performance.

Citrus paradisi 和 Cymbopogon 馏出物以 1:1 的比例混合，并评估它们在 0.25 MH ₂ SO ₄ –3.5% NaCl 电解液中对 Cu-Ni 铜镍合金的抑制作用。结果表明，馏出物在 2-5% CPC 浓度下有效抑制了 Cu-Ni 合金。不含馏出液的 Cu-Ni 合金的降解率为 0.373 mm/y，而在 1% 的浓度下，降解率降至 0.140 mm/y (1.37 × 10 ^-5 A/cm ²) 对应的抑制效率为 62.46%。在 2-5% 的浓度下，抑制效率介于 80.47 和 95.58% 之间。馏出物显示出混合型抑制性能，同时显着抑制阴极还原反应。热力学计算表明，根据 Langmuir 和 Freundlich 吸附等温线（相关系数大于 0.8），馏出物通过化学吸附吸附到 Cu-Ni 合金上。吉布斯自由能表明馏出物分子之间的横向吸引力相对于#concentration 增加。开路电位曲线显示，尽管具有有效的抑制性能，但馏出物增加了 Cu 的热力学不稳定性。