Improved corrosion resistance and interfacial contact resistance of 316L stainless-steel for proton exchange membrane fuel cell bipolar plates by chromizing surface treatment

Review – Metallic Bipolar Plates and Their Usage in Energy Conversion Systems

“…Wen et al [81] reported that modified SS420 chromized by a low temperature process possessed a reduction of four to five orders of magnitude when compared with its bulk substrate (100 µA/cm² -10 µA/cm²). The contact resistances value at 12-18 mOhm*cm² was below those of Lee [42] and colleagues released in 2009. Other experiments by Bai et al [5] showed an influence on the pretreatment of AISI1020 as the substrate material which was also chromized by pack cementation.…”

“…Lee et al [42] investigated a chromizing process for 316L by CVD enhanced pack cementation. They used two different powder mixtures consisting of 50 % Cr, 43 % Al 2 O 3 (A) and 7% NH 4 C respectively 25 % Cr, 72 % Al 2 O 3 and 3 % NH 4 C (B).…”

Honeycomb-like nanocomposite Ti-Ag-N films prepared by pulsed bias arc ion plating on titanium as bipolar plates for unitized regenerative fuel cells

“…Surface morphology was observed with scanning electron microscopy (JSM-5600LV) equipped with energy dispersive X-ray spectroscopy (EDX). The ICR between uncoated, coated bipolar plates and diffusion layer (carbon paper) was measured with the conventional method extensively used by many researchers [9,14,33,34]. In the set up, two pieces of Toray carbon paper were sandwiched between the bipolar plate sample and two copper plates.…”

“…Bipolar plates (BPPs) for PEMFC have been investigated extensively [4][5][6][7][8][9][10][11][12][13][14][15], while few reports have been presented on the BPPs for URFCs. The operating environment of URFCs in water electrolysis (WE) mode is much harsher than that in fuel cell (FC) mode.…”

Electrochemical Properties of NiO-YSZ Thin Films on 316 Stainless Steel Bipolar Plates Under a Simulated PEMFC Environment

“…6 The voltage drop across the specimen located in the middle of two copper plates was measured as a function of the force up to 500 N. 3,10,11 Two pieces of conducting carbon paper were inserted between the sample plate and copper plates. An electrical current (1A) was provided through the two copper plates.…”