In the dental office, surgical instruments must be sterilized for each patient, following their contamination by saliva and blood. Repeated sterilization cycles cause corrosion. A worn out and corroded instrument may cause toxicity to the patient. The aim of our study is to improve the corrosion resistance of orthodontic pliers during sterilization using green inhibitors. The behaviour of AISI 410 stainless steel with respect to corrosion was studied in a $$0.5~\hbox {M H}_{{2}}\hbox {SO}_{{4}}$$ , using cladodes of Opuntia ficus-indica (OFI) as a green inhibitor. Temperature effect on OFI efficacy was studied for different ranges (25, 35 and $$45^{\circ } \hbox {C}$$ ). The study was carried out using the weight loss method, the stationary electrochemical techniques (polarization curves), the transients (electrochemical impedance spectroscopy), and the scanning electron microscopy associated with X-ray dispersive energy spectroscopy (SEM–EDX) and atomic force microscopy (AFM) observations. OFI behaves as a mixed inhibitor, with a physisorbed adsorption obeying to Langmuir isotherm and, with an efficacy ranging from 95.12 to 15% (v/v) obtained after 12 h immersion at a temperature of $$25^{\circ } \hbox {C}$$ . The SEM–EDX and AFM observations confirm the obtained results. In conclusion, OFI improves corrosion resistance of AISI 410 stainless steels in $$0.5~\hbox {M H}_{{2}}\hbox {SO}_{{4}}$$ at $$25^{\circ } \hbox {C}$$ .

中文翻译：

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Opuntia ficus-indica 作为 AISI 410 不锈钢上耐用且环保的腐蚀抑制剂，售价 $0.5~\hbox {M}\,\hbox {H}_{{2}}\hbox {SO}_{{4} }$$

在牙科诊所，手术器械必须在被唾液和血液污染后为每位患者消毒。重复的灭菌循环会导致腐蚀。磨损和腐蚀的器械可能会对患者造成毒性。我们研究的目的是在使用绿色抑制剂进行灭菌过程中提高正畸钳子的耐腐蚀性。使用仙人掌枝条在 $0.5~\hbox {MH}_{{2}}\hbox {SO}_{{4}}$$ 中研究 AISI 410 不锈钢的腐蚀行为(OFI) 作为绿色抑制剂。研究了不同范围（25、35 和 $$45^{\circ} \hbox {C}$$）的温度对 OFI 功效的影响。该研究使用失重法、稳态电化学技术（极化曲线）、瞬态（电化学阻抗谱）、以及与 X 射线色散能谱 (SEM-EDX) 和原子力显微镜 (AFM) 观察相关的扫描电子显微镜。OFI 表现为混合抑制剂，其物理吸附吸附遵循朗缪尔等温线，在 25 美元 ^{\circ } \hbox { 的温度下浸泡 12 小时后，其功效范围为 95.12 至 15% (v/v) C}$$ 。SEM-EDX 和 AFM 观察证实了所获得的结果。总之，OFI 提高了 AISI 410 不锈钢的耐腐蚀性 $$0.5~\hbox {MH}_{{2}}\hbox {SO}_{{4}}$$ $$25^{\circ } \hbox {C}$$ 。在 $$25^{\circ} \hbox {C}$$ 的温度下浸泡 12 小时后获得的功效范围为 95.12 至 15% (v/v)。SEM-EDX 和 AFM 观察证实了所获得的结果。总之，OFI 提高了 AISI 410 不锈钢的耐腐蚀性 $$0.5~\hbox {MH}_{{2}}\hbox {SO}_{{4}}$$ $$25^{\circ } \hbox {C}$$ 。在 $$25^{\circ} \hbox {C}$$ 的温度下浸泡 12 小时后获得的功效范围为 95.12 至 15% (v/v)。SEM-EDX 和 AFM 观察证实了所获得的结果。总之，OFI 提高了 AISI 410 不锈钢的耐腐蚀性 $$0.5~\hbox {MH}_{{2}}\hbox {SO}_{{4}}$$ $$25^{\circ } \hbox {C}$$ 。