Investigation on the Corrosion Resistance of PIM 316L Stainless Steel in PEM Fuel Cell Simulated Environment

2010 ◽  
Vol 660-661 ◽  
pp. 209-214 ◽  
Author(s):  
Mara Cristina Lopes de Oliveira ◽  
Isolda Costa ◽  
Renato Altobelli Antunes
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Fuel Cell ◽  
Large Scale ◽  
316L Stainless Steel ◽  
Electrochemical Impedance ◽  
Pem Fuel Cell ◽  
Corrosion Current ◽  
Pem Fuel Cells ◽  
Sem Images

Bipolar plates play main functions in PEM fuel cells, accounting for the most part of the weight and cost of these devices. Powder metallurgy may be an interesting manufacturing process of these components owing to the production of large scale, complex near-net shape parts. However, corrosion processes are a major concern due to the increase of the passive film thickness on the metal surface, lowering the power output of the fuel cell. In this work, the corrosion resistance of PIM AISI 316L stainless steel specimens was evaluated in 1M H2SO4 + 2 ppm HF solution at room temperature during 30 days of immersion. The electrochemical measurements comprised potentiodynamic polarization and electrochemical impedance spectroscopy. The surface morphology of the specimens was observed before and after the corrosion tests through SEM images. The material presented low corrosion current density suggesting that it is suitable to operate in the PEM fuel cell environment.

Effect of Passivation Treatments on the Corrosion Resistance of PIM 316L Stainless Steel in a PEM Fuel Cell Simulated Environment

2012 ◽  
Vol 727-728 ◽  
pp. 96-101
Author(s):  
Isaac Jamil Sayeg ◽  
Renato Altobelli Antunes ◽  
Mara Cristina Lopes de Oliveira
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Anodic Polarization ◽  
Room Temperature ◽  
Strong Influence ◽  
316L Stainless Steel ◽  
Electrochemical Impedance ◽  
Pem Fuel Cell ◽  
Simulated Environment ◽  
Before And After

In this work, the corrosion resistance of passivated PIM 316L stainless steel specimens was evaluated in 1M H2SO4 + 2 ppm HF solution at room temperature during 28 days of immersion. Passivation was carried out in HNO3and H2SO4solutions. The electrochemical behavior of the passivated specimens was assessed through electrochemical impedance spectroscopy and anodic polarization curves. Scanning electron microscopy (SEM) was employed to observe the surface of the specimens before and after the passivation treatments. The results pointed to a strong influence of the passivation conditions on the corrosion resistance of the specimens.

PVD Coated Bipolar Plates for PEM Fuel Cells

2005 ◽  
Vol 2 (4) ◽  
pp. 290-294 ◽  
Author(s):  
Shuo-Jen Lee ◽  
Ching-Han Huang ◽  
Yu-Pang Chen ◽  
Chen-Te Hsu
Keyword(s):  
Corrosion Resistance ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Physical Vapor Deposition ◽  
Corrosion Current ◽  
Pem Fuel Cells ◽  
Bipolar Plates ◽  
Coating Materials ◽  
Pvd Coating ◽  
Simulated Fuel

Aluminum was considered a good candidate material for bipolar plates of the polymer electrolyte membrane (PEM) fuel cells due to its low cost, light weight, high strength and good manufacturability. But there were problems of both chemical and electrochemical corrosions in the PEM fuel cell operating environment. The major goals of this research are to find proper physical vapor deposition (PVD) coating materials which would enhance surface properties by making significant improvements on corrosion resistance and electrical conductivity at a reasonable cost. Several coating materials had been studied to analyze their corrosion resistance improvement. The corrosion rates of all materials were tested in a simulated fuel cell environment. The linear polarization curve of electrochemical method measured by potentiostat instrument was employed to determine the corrosion current. Results of the corrosion tests indicated that all of the coating materials had good corrosion resistance and were stable in the simulated fuel cell environment. The conductivities of the coated layers were better and the resistances changed very little after the corrosion test. At last, single fuel cells were made by each PVD coating material. Fuel cell tests were conducted to determine their performance w.r.t. that was made of graphite. The results of fuel cell tests indicated that metallic bipolar plates with PVD coating could be used in PEM fuel cells.

scholarly journals Corrosion Resistance of AISI 316L Stainless Steel Biomaterial after Plasma Immersion Ion Implantation of Nitrogen

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6790
Author(s):  
Viera Zatkalíková ◽  
Juraj Halanda ◽  
Dušan Vaňa ◽  
Milan Uhríčik ◽  
Lenka Markovičová ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Ion Implantation ◽  
316L Stainless Steel ◽  
Electrochemical Impedance ◽  
Austenitic Stainless Steels ◽  
Aisi 316L ◽  
Corrosion Properties ◽  
Aisi 316L Stainless Steel ◽  
Plasma Immersion Ion Implantation

Plasma immersion ion implantation (PIII) of nitrogen is low-temperature surface technology which enables the improvement of tribological properties without a deterioration of the corrosion behavior of austenitic stainless steels. In this paper the corrosion properties of PIII-treated AISI 316L stainless steel surfaces are evaluated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PP) and exposure immersion tests (all carried out in the 0.9 wt. % NaCl solution at 37 ± 0.5 °C) and compared with a non-treated surface. Results of the three performed independent corrosion tests consistently confirmed a significant increase in the corrosion resistance after two doses of PIII nitriding.

scholarly journals Properties of a Plasma-Nitrided Coating and a CrNx Coating on the Stainless Steel Bipolar Plate of PEMFC

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 183 ◽  
Author(s):  
Meiling Xu ◽  
Shumei Kang ◽  
Jinlin Lu ◽  
Xinyong Yan ◽  
Tingting Chen ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
316L Stainless Steel ◽  
High Efficiency ◽  
Electrochemical Impedance ◽  
Bipolar Plate ◽  
Working Environment ◽  
Stainless Steel Surface ◽  
Bipolar Plates ◽  
Better Than

PEMFC are considered to be the most promising for automotive energy because of their good working effect, low temperature, high efficiency, and zero pollution. Stainless steel as a PEMFC bipolar plate has unparalleled advantages in strength, cost, and processability, but it is easy to corrode in a PEMFC working environment. In order to improve the corrosion resistance, the surface modification of 316L stainless steel is a feasible solution for PEMFC bipolar plates. In the present study, the plasma-nitrided coating and CrNx coating were prepared by the plasma-enhanced balanced magnetron sputtering technology on the 316L stainless steel surface. The microstructures, phase compositions, and corrosion resistance behavior of the coatings were investigated. The corrosion behavior of the prepared plasma-nitrided coating and CrNx coating was investigated by potentiodynamic polarization, potentiostatic polarization, and electrochemical impedance spectroscopy (EIS) in both cathodic and anodic environments. The experimental results show that corrosion resistance of the CrNx coating was better than the plasma-nitrided coating. It was indicated that the technology process of nitriding first and then depositing Cr was better than nitriding only.

An investigation into nickel implanted 316L stainless steel as a bipolar plate for PEM fuel cell

2008 ◽  
Vol 182 (1) ◽  
pp. 145-152 ◽  
Author(s):  
Kai Feng ◽  
Yao Shen ◽  
Jianming Mai ◽  
Dongan Liu ◽  
Xun Cai
Keyword(s):  
Stainless Steel ◽  
Fuel Cell ◽  
316L Stainless Steel ◽  
Pem Fuel Cell ◽  
Bipolar Plate

scholarly journals Influence of Extrusion Temperature on the Corrosion Behavior in Sodium Chloride Solution of Solid State Recycled Aluminum Alloy 6061 Chips

Crystals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 353
Author(s):  
Nabeel H. Alharthi ◽  
El-Sayed M. Sherif ◽  
Mohamed A. Taha ◽  
Adel T. Abbas ◽  
Hany S. Abdo ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Elevated Temperatures ◽  
Electrochemical Impedance ◽  
Corrosion Current ◽  
Extrusion Temperature ◽  
Sem Images ◽  
Current Time ◽  
Aluminum Alloy 6061 ◽  
Alloy 6061

In the present work, aluminum alloy 6061 (AA6061) device chips were subjected to cold compaction monitored by an extrusion procedure at an extrusion ratio of 5:2 and elevated temperatures of 350, 425, and 500 °C, respectively. The influence of changing temperature on the corrosion of the extruded alloys after 1 h and 24 h in 3.5% NaCl solutions was studied. The polarization (cyclic potentiodynamic polarization, CPP) results indicated that the corrosion decreases with the increase of extrusion temperature of AA6061 from 350 to 500 °C. Impedance (electrochemical impedance spectroscopy, EIS) experiments provided a remarkable increase in the corrosion resistance with rising the extrusion temperature. Potentiostatic current-time (PCT) curves indicated that the current initially increased then decreased for all alloys after 1 h measurements. Prolonging the exposure time to 24 h was observed to decrease the rate of corrosion for all AA6061 alloys as proved by CPP and EIS data. This effect was found to increase the pitting corrosion as indicated by the measured PCT curves and by the scanning electron microscopy (SEM) images for the surface of the alloys. The surface layers formed on AA6061 alloys were mostly composed of aluminum oxide as presented by the spectra of the energy dispersive X-ray analyzer (EDX). All results indicated that the increase of the temperature of extrusion increased the corrosion resistance via decreasing the corrosion current and corrosion rate, and that this effect was found remarkably increased when the immersion time increased from 1 to 24 h exposure to the chloride test solution.

Development of a PEM Fuel Cell Electrode Coating Testbed

2010 ◽  
Author(s):  
Casey J. Hoffman ◽  
Daniel F. Walczyk
Keyword(s):  
Fuel Cell ◽  
Large Scale ◽  
Platinum Catalyst ◽  
Polymer Electrolyte Membrane ◽  
Quality Measurement ◽  
Catalyst Layer ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Gas Diffusion ◽  
Electrode Coating

Two of the largest barriers to PEMFC commercialization are the materials costs for individual components, especially platinum catalyst, and the fact that few large-scale manufacturing capabilities currently exist. This paper focuses on the development of a testbed which will be used for evaluating coating technologies for use in the manufacture of polymer electrolyte membrane (PEM) fuel cell electrodes. More specifically, the focus is on diffusion electrode architecture, in which the catalyst layer is applied to a gas diffusion layer (GDL) rather than on the membrane. These electrodes are used for both low- and high-temperature PEM fuel cells. A flexible web coating testbed has been designed and built to allow for testing of different gas diffusion electrode (GDE) and GDL deposition methods. This testbed, which is approximately two meters in length, includes a variety of both coating and drying capabilities as well as additional space for quality measurement and control system testing. Testbed capabilities and planned experimentation is discussed in detail. In the future, various non-contact deposition methods for the microlayer and catalyst inks will be investigated (e.g., direct spray, ultrasonic spray) to determine those that will provide higher throughput and repeatability through increased process control capability, while improving electrode performance.

Effects of CO on Performance of HT-PEM Fuel Cells

2013 ◽  
Vol 724-725 ◽  
pp. 723-728
Author(s):  
Xue Nan Zhao ◽  
Hong Sun ◽  
Zhi Jie Li
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Large Scale ◽  
Proton Exchange Membrane ◽  
High Efficiency ◽  
Electrochemical Reaction ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Fuel Cell Performance

High temperature proton exchange membrane (HT-PEM) fuel cell is considered as one of the most probable fuel cells to be large-scale applied due to characteristics of high efficiency, friendly to environment, low fuel requirement, ease water and heat management, and so on. However, carbon monoxide (CO) content in fuel plays an important role in the performance of HT-PEM fuel cells. Volt-ampere characteristics and AC impedance of HT-PEM fuel cell are tested experimentally in this paper, and effects of CO in fuel on its performance are analyzed. The experimental results show that CO in fuel increases remarkably the Faraday resistance of HT-PEM fuel cell and decreases the electrochemical reaction at anode; the more CO content in fuel is, the less HT-PEM fuel cell performance is; with the increasing cell temperature, the electrochemical reaction on the surface of catalyst at anode is improved and the poisonous effects on the HT-PEM fuel cell are alleviated.

Formation of a protective nitride layer by electrochemical nitridation on 316L SS bipolar plates for a proton exchange membrane fuel cell (PEMFC)

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64466-64470 ◽  
Author(s):  
S. Pugal Mani ◽  
C. Anandan ◽  
N. Rajendran
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Fuel Cell ◽  
Electrolyte Solution ◽  
Proton Exchange Membrane ◽  
316L Stainless Steel ◽  
Nitride Layer ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
Exchange Membrane

In the present study, an attempt has been made to increase the corrosion resistance of 316L stainless steel (SS) bipolar plates (Bp) through electrochemical nitridation using a nitrate bearing electrolyte solution of 0.1 M HNO3 and 0.5 M KNO3.

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