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Testing method for corrosion resistance of bipolar plate used for fuel cell

A technology for fuel cells and testing methods, applied in the fields of weather resistance/light resistance/corrosion resistance, measuring devices, analysis materials, etc., which can solve the problem of long corrosion current test time, uncertainty, and inability to quickly reflect the corrosion resistance of bipolar plates Features and other issues, to achieve the effect of fast testing, easy operation, and avoiding data processing errors

Active Publication Date: 2018-08-03
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion current is obtained by tangent line of Tafel curve test, and its value is affected by scan rate and tangent line position, which has certain uncertainty
However, the corrosion current test time under constant potential is longer, which cannot quickly reflect the corrosion resistance characteristics of the bipolar plate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for testing the corrosion resistance of a bipolar plate for a fuel cell comprises the following steps: using a five-port corrosion pool as a container, containing 0.5M H 2 SO 4 +5ppm F – Electrolyte solution, the other bottle mouth of the five-port corrosion cell is used to place the reference electrode (saturated silver chloride reference electrode, reversible hydrogen reference electrode (reversible hydrogen electrode, RHE)), one bottle port is used to place the counter electrode, and the other two One bottle port is used to introduce and export oxygen; the bipolar plate material after cleaning the surface is placed in the five-port corrosion pool, and connected to the working electrode of the electrochemical workstation; the open circuit potential (open circuit potential) of the bipolar plate material is tested , OCP). Comparing the OCP of similar bipolar plate materials, the bipolar plate material with higher OCP has better corrosion resistance, and the t...

Embodiment 2

[0032] A method for testing the corrosion resistance of bipolar plates for fuel cells, the following steps are used: using five corrosion pools as containers, in which 0.4M H 2 SO 4 +6ppm F – Electrolyte solution, the other bottle mouth of the five-port corrosion cell is used to place the reference electrode (saturated silver chloride reference electrode, reversible hydrogen reference electrode (reversible hydrogen electrode, RHE)), one bottle port is used to place the counter electrode, and the other two One bottle port is used to introduce and export oxygen; the bipolar plate material after cleaning the surface is placed in the five-port corrosion pool, and connected to the working electrode of the electrochemical workstation; the open circuit potential (open circuit potential) of the bipolar plate material is tested , OCP). Comparing the OCP of similar bipolar plate materials, the bipolar plate material with higher OCP has better corrosion resistance, and the temperature ...

Embodiment 3

[0034] A method for testing the corrosion resistance of bipolar plates used in fuel cells, the following steps are used: using five corrosion pools as containers, in which 0.6M H 2 SO 4 +4ppm F – Electrolyte solution, the other bottle mouth of the five-port corrosion cell is used to place the reference electrode (saturated silver chloride reference electrode, reversible hydrogen reference electrode (reversible hydrogen electrode, RHE)), one bottle port is used to place the counter electrode, and the other two One bottle port is used to introduce and export oxygen; the bipolar plate material after cleaning the surface is placed in the five-port corrosion pool, and connected to the working electrode of the electrochemical workstation; the open circuit potential (open circuit potential) of the bipolar plate material is tested , OCP). Comparing the OCP of similar bipolar plate materials, the bipolar plate material with higher OCP has better corrosion resistance, and the temperat...

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Abstract

The invention relates to a testing method for the corrosion resistance of a bipolar plate used for a fuel cell. The testing method comprises the following steps: placing a cleaned bipolar plate material in an electrolyte solution and connecting the bipolar plate material with the working electrode of an electrochemical workstation; inserting a reference electrode and a counter electrode into the electrolyte solution; and with testing controlled to be carried out in an oxygen atmosphere, carrying out power-on testing on the open circuit potential (OCP) of the bipolar plate material so as to determine the corrosion resistance of the bipolar plate. Compared with the prior art, the testing method provided by the invention can quickly determine the corrosion resistance characteristic of the bipolar plate only by measuring the OCP of the bipolar plate material.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a method for testing the corrosion resistance of bipolar plates used in fuel cells. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is considered to be the first choice for the next generation of mobile alternative energy due to its advantages of high efficiency, cleanliness, and fast start-up. The main components of a fuel cell stack include membrane electrode assemblies, bipolar plates, etc., among which the bipolar plates account for a large proportion of the volume and mass of the stack. In addition, the bipolar plate also plays the role of collecting current, distributing fuel and oxidant, and separating single cells. Therefore, an ideal bipolar plate needs to have characteristics such as good electrical conductivity, high air tightness, low density, and good corrosion resistance. There are two types of bipolar plates commonly used at present: graphite bi...

Claims

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Application Information

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IPC IPC(8): G01N17/02
CPCG01N17/02
Inventor 徐鑫杜晓莉
Owner SHANGHAI SHENLI TECH CO LTD
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