Corrosion proxy materials integrated with an optical sensing platform enable a real-time optical corrosion sensor for natural gas pipelines to prevent methane leaks and catastrophic events. Effects of CO₂, pH, and film thickness on corrosion of Fe thin films (25 nm, 50 nm, 100 nm) were studied using optical and electrochemical methods in 3.5 wt.% NaCl solutions at 30°C. An increase in light transmission (T%) corresponded to corrosion of Fe thin films. CO₂ accelerated corrosion of Fe thin films because of the lower pH and the promoted corrosion reactions, resulting in a faster increase of T% than without CO₂ or at higher pH. While the corrosion rate increased with increasing film thickness, electrochemical corrosion of Fe thin films was in good agreement with that of bulk carbon steel, verifying that Fe thin films can serve as a representative corrosion proxy when integrated with the optical sensing platform.

集成有光学传感平台的腐蚀替代材料可为天然气管道提供实时光学腐蚀传感器，以防止甲烷泄漏和灾难性事件。使用光学和电化学方法，在3.5 wt。％NaCl溶液中，于30°C，研究了CO ₂，pH和膜厚对Fe薄膜（25 nm，50 nm，100 nm）腐蚀的影响。透光率（T％）的增加对应于Fe薄膜的腐蚀。由于较低的pH值和促进的腐蚀反应，CO ₂加速了Fe薄膜的腐蚀，与没有CO ₂相比，导致T％的增加更快或在较高pH下。尽管腐蚀速率随膜厚的增加而增加，但Fe薄膜的电化学腐蚀与块状碳钢的电化学腐蚀有很好的一致性，这证明与光学传感平台集成后，Fe薄膜可以作为代表性的腐蚀代用品。