Copper and zinc alloys have applications in products exposed to harsh environments. Usually, these products have upon their surface a thin film of oxides, whose properties may change due to the exposure to air or aqueous solutions at room temperatures. This work analyzed copper and zinc alloy surfaces exposed to aqueous solutions of alcohol and a sugarcane liquor using mainly spectroscopic ellipsometry and confocal microscopy at room temperature. Using ellipsometry, oxide thickness was measured, either native ones or grown ones on the substrate exposed to air, and finally, those grown with the used solutions. Confocal microscopy was used to analyze the topography of the samples and measure their surface roughness in all processes. Besides, scanning electron microscopy with energy dispersion spectroscopy verified the composition of the elements present in the alloy, obtaining 70% Cu and 30% Zn. Surface roughness and oxide thickness were monitored by 29 days when the surfaces were exposed to air. Average roughness R_a varied from 0.165 µm (day 1) to 0.222 µm (day 29). Oxide thickness ranged from 4.755 nm (day 1) to 11.192 (day 29) in the same time interval when surfaces were exposed to air at room temperature. Roughness and thickness were also measured when the surfaces were exposed to aqueous solutions of alcohol and a sugarcane liquor at 1.5 h, 8 h, 24 h, and 48 h of exposure. The greatest variation for both average roughness R_a (0.232 µm to 0.76 µm) and oxide thickness (32.774 nm–68.105 nm) was observed when the surfaces were exposed to sugarcane liquor.

铜和锌合金可用于暴露于恶劣环境的产品中。通常，这些产物在其表面上具有氧化物薄膜，其氧化物性质可能由于暴露于室温下的空气或水溶液中而改变。这项工作主要在室温下使用椭圆偏振光谱法和共聚焦显微镜分析了暴露于酒精和甘蔗酒水溶液的铜和锌合金表面。使用椭圆光度法，测量暴露于空气中的基底上的氧化物厚度（天然的或生长的），最后测量使用过的溶液生长的氧化物的厚度。共聚焦显微镜用于分析样品的形貌，并在所有过程中测量其表面粗糙度。除了，扫描电子显微镜和能量色散光谱法验证了合金中元素的组成，得到70％的铜和30％的锌。当表面暴露在空气中29天时，监测表面粗糙度和氧化物厚度。平均粗糙度R_a从0.165 µm（第1天）到0.222 µm（第29天）不等。当表面在室温下暴露于空气中的同一时间间隔内，氧化物厚度范围为4.755 nm（第1天）至11.192（第29天）。当在1.5小时，8小时，24小时和48小时的暴露条件下将表面暴露于酒精和甘蔗酒的水溶液时，还测量了粗糙度和厚度。当表面暴露于甘蔗液时，平均粗糙度R _a（0.232 µm至0.76 µm）和氧化物厚度（32.774 nm–68.105 nm）的变化最大。