Opuntia ficus-indica as a durable and eco-friendly corrosion inhibitor on AISI 410 stainless steel in $$0.5~\hbox {M}\,\
- PDF / 3,571,192 Bytes
- 16 Pages / 595.276 x 790.866 pts Page_size
- 56 Downloads / 175 Views
© Indian Academy of Sciences
Opuntia ficus-indica as a durable and eco-friendly corrosion inhibitor on AISI 410 stainless steel in 0.5 M H2 SO4 R BOULMERKA and S ABDERRAHMANE∗ Laboratory of Surface Engineering, University of Badji Mokhtar-Annaba, B.P. 12, El Hadjar, Annaba, Algerie ∗ Author for correspondence ([email protected]) MS received 25 September 2019; accepted 28 April 2020 Abstract. 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 M H2 SO4 , 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◦ 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◦ 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 M H2 SO4 at 25◦ C. Keywords.
Corrosion; orthodontic pliers; stainless steel; acid solutions; green inhibitor; EIS.
1. Introduction Dentistry is a science area which requires an impressive amount of equipment. Dental instruments must be sterilized after each patient use [1]. The main purpose of sterilization is to prevent both patient and practitioner from nosocomial infection either by cross-contamination or infectious diseases such as hepatitis B, pneumonia, HIV/AIDS, hepatitis C, and airborne diseases like influenza and tuberculosis [2,3]. Its major disadvantage lies in dental instrument deterioration by corrosion. Therefore it becomes essential to study and understand the corrosion phenomenon, thus showing its significant consequences on dental equipment durability and resistance. There exist many methods to prevent metal corrosion. The use of inhibitors to fight against stainless steel corrosion in a H2 SO4 medium is widespread [4]. The development of green inhibitors against corrosion is of a strong interest in the field of science and technology. Over recent decades, plant extracts used as green corrosion inhibitors were the subject of several studies for both their non-toxicity aspect, and their biodegradable and environmental properties. This study about the use of cladodes of grated Opuntia ficus-indica (OFI) as a green corr
Data Loading...
