دانلود مقاله رسوب الکتریکی و خصوصیات لایه های پلی پیرول بر فولاد ضدزنگ T304
چکیده
مقدمه
نتایج و بحث
نتیجه گیری
منابع
Abstract
Introduction
Results and discussion
Conclusions
References
چکیده
این کار مطالعه ای را بر روی رسوب الکتروشیمیایی پلی پیرول (PPy) روی فولاد ضد زنگ T304 و اثراتی که پلاسمای تخلیه درخشان (GDP) در محلول آبی هنگام دوپینگ با پلی پیرول (PPy) داشت، ارائه می دهد. رسوب گذاری و دوپینگ در فشار اتمسفر با زمان های 10، 30 و 60 دقیقه انجام شد. نتایج نشان داد که دوپینگ تولید ناخالص داخلی مورفولوژی را تغییر داده و حضور پیوندهای دوگانه C=C، C=O و C=N را افزایش داده است که با افزایش سطح پیوند متقابل فیلم‌های رسوب‌شده، ناپدید شدن گروه عاملی NH، و ظاهر پیوندهای N-O مشاهده می‌شود که زمان درمان با تولید ناخالص داخلی نقش مهمی در اصلاح فیلم رسوب‌شده و همچنین افزایش رسانایی از 0.075 به 0.32 S/cm داشت. عملکرد خوردگی فیلم‌های رسوب‌شده بر روی سطوح فولاد ضد زنگ تحت غوطه‌وری اسید سولفوریک در 0.1 M ارائه شده است. نتایج به‌دست‌آمده نشان داد که پوشش در 60 دقیقه به دلیل مورفولوژی فشرده‌تر، بهبود قابل‌توجهی در برابر خوردگی ایجاد کرد.
توجه! این متن ترجمه ماشینی بوده و توسط مترجمین ای ترجمه، ترجمه نشده است.
Abstract
This work presents a study on the electrochemical deposition of polypyrrole (PPy) on T304 stainless steel and the effects that glow discharge plasma (GDP) in aqueous solution had when doping with polypyrrole (PPy). Deposition and doping were carried out at atmospheric pressure with times of 10, 30, and 60 min. The results showed that GDP doping changed the morphology and increased the presence of C=C, C=O, and C=N double bonds, associated with an increase in the level of crosslinking of deposited films, the disappearance of NH functional group, and the appearance of N–O bonds. It is observed that the treatment time with GDP played an important role in the modification of the deposited film, as well as the increase in conductivity from 0.075 to 0.32 S/cm. The corrosion performance of the films deposited on the stainless steel surfaces under immersion of sulfuric acid at 0.1 M are presented. The results obtained revealed that the coating at 60 min provided a notable improvement against corrosion due to the more compact morphology.
Introduction
Polypyrrole (PPy) is a conductive polymer. This material has diferent applications, which include rechargeable batteries, electrochemical capacitors, etc. [1]. Among other components of the fuel cell stack, the bipolar plate is considered one of the most expensive and troublesome. The search for suitable materials for the bipolar plate is a key concern in fuel cell stack development. As bipolar plates operate in constant contact with acidic water (pH 5) which is generated in the operating conditions of the cell, high chemical stability and corrosion resistance are required [2]. Fuel cells (PEM) are the most common cell types, using hydrogen as fuel [3]. A single bipolar plate is machined on both sides to transport hydrogen in the form of gas on one side (anode) and air on the other (cathode), while the end plates have a channel system only on one side and are electrically connected through an external circuit [4]. The present research focuses on the electrochemically deposition of polypyrrole doped with iodine (PPy/I) on a T304 stainless steel plate with diferent deposition times and its subsequent characterization by FT-IR spectroscopy, scanning electron microscopy (SEM) in addition to measuring its conductivity and its corrosion resistance.
Conclusions
In this study, polypyrrole films were electrochemically deposited on T304 stainless steel to study their anticorrosive properties for diferent doping times deposition. The results showed that by increasing the deposition times, the percentage of carbon in the flm increased, as well as the doping time allowed a growth in the percentage of iodine, also the conductivity increased from 0.075 to 0.32 S/cm, respectively. These results can help bipolar plate performance since as a component of a fuel cell, it requires good conductivity. Deposition also infuenced the morphology, allowing the particle size to be reduced, making surface more compact to prevent corrosive substances from seeping into the steel, generating corrosion. On the other hand, deposition time, as well as the doping time allowed to increase the thickness of the flm, although it was observed that the thicker the flm, the flm loses more mass when exposed to sulfuric acid in the same period of time, for its morphology is recommended for the flm deposited at 60 min for the aforementioned. In addition, due to good conductivity and corrosion performance, plates can also be applied as sensors, smart windows, and artifcial muscles.