随着全球环保意识的增强，石油和天然气行业正在其运营中引入可在处置后降解的替代化学品。然而，人们更担心的是每天产生的废物，这些废物堆积在垃圾填埋场中，回收解决方案很少。研究表明，冲洗过期药物会将药物渗入环境中，从而对植物和水生生物造成严重危害。本文探讨了使用过期的高使用药物作为腐蚀抑制剂的可能性。

为了确定过期药物的抑制效率，将低碳钢金属试样暴露于 77 至 200°F 温度下的 15 wt% HCl 溶液中。根据药物的功能，药物分为三类：A 类、B 类和 C 类。每类药物均制成粉末，并在这些测试中以 2 wt% 的浓度使用 6 小时。此外，还使用不含腐蚀抑制剂的对照溶液来确定基准情况下的腐蚀速率。

观察到 C 类药物在室温下表现良好，最大腐蚀抑制效率可达 99%。另一方面，A 类和 B 类药物的腐蚀抑制效果不及 A 类和 B 类药物。在 150°F 的温度下，对照溶液发生严重故障，腐蚀速率为 0.371 lbm/ft ²，而使用 C 类药物可保持 88.3% 的良好腐蚀抑制效率。当温度升至 200°F 时，观察到的腐蚀速率为 0。在存在 1 wt% 腐蚀抑制剂增强剂的情况下，C 类药物的腐蚀速率为 0.0352 lbm/ft ²。这些结果符合油气可接受的低碳钢腐蚀要求，即在 6 小时内产生低于 0.05 lbm/ft ²的腐蚀速率。

这项研究表明，过期药物可以用作腐蚀抑制剂。由于它们过期且不适合人类食用，因此成本本来就很低。因此，这些化学品可以作为商用腐蚀抑制剂的替代品，同时减少对环境的破坏。

SPE 会员可于 6 月 20 日至 7 月 3 日期间从 SPE 的健康、安全、环境和可持续性技术学科页面免费下载完整论文。

在此处查找 OnePetro 上的论文 SPE 216036。

As environmental awareness is rising worldwide, the oil and gas industry is introducing alternative chemicals in its operations that can degrade after disposal. Yet, there is a bigger concern regarding waste materials that are generated daily and accumulate in landfills with minimal recycling solutions. Research has shown that flushed expired medications leach pharmaceuticals into the environment, consequently causing severe harm to plants and aquatic life. This paper explores the possibility of using expired high-use medications as corrosion inhibitors.

To determine the inhibition efficiency of expired medications, low-carbon steel metal coupons were exposed to 15 wt% HCl solutions at temperatures between 77 and 200°F. The medications have been divided into three categories based on their functionality: Category A, Category B, and Category C. Medications from each category were powdered and were used in these tests at a concentration of 2 wt% for 6 hours. In addition, a control solution containing no corrosion inhibitor was used to establish a corrosion rate for a base case.

Category C medication was observed to perform well at room temperature, providing a maximum of 99% corrosion inhibition efficiency. Category A and Category B, on the other hand, did not provide as much corrosion inhibition. At a temperature of 150°F, the control solution showed a catastrophic failure producing a corrosion rate of 0.371 lbm/ft², whereas the use of Category C medication was observed to maintain good corrosion inhibition efficiency of 88.3%. When the temperature was raised to 200°F, the corrosion rate observed was 0. 0.0352 lbm/ft² for Category C medication, in the presence of 1 wt% corrosion inhibitor intensifier. These results pass the oil and gas acceptable low-carbon steel corrosion requirements of producing a corrosion rate below 0.05 lbm/ft² for 6 hours.

This work shows that expired medications can be used as corrosion inhibitors. Because they are expired and not fit for human consumption, the cost is inherently low. Thus, these chemicals may provide alternatives to commercial corrosion inhibitors while concurrently reducing damage to the environment.

SPE members can download the complete paper from SPE’s Health, Safety, Environment, and Sustainability Technical Discipline page for free from 20 June to 3 July.

Find paper SPE 216036 on OnePetro here.