Optimal surface treatment for fuel cell metal separators

Highly corrosion resistant and highly conductive oxide film produced by mist CVD method

Patent No. 6789490
Patent No. 7092280, US11,189,846,132

Features

Simple and highly functional CVD coating that can be deposited in the atmosphere.

Conventional CVD method ⇒ Deposition in vacuum
・High cost of equipment
・It takes time to vacuum

Mist CVD method → Deposition in the atmosphere

Required for fuel cell separators Corrosion resistant and conductive High performance metal oxide film
Cost reduction due to high-speed film formation
Good adhesion to base material, high coverage

**Metal separator coated with mist CVD method**

Applying Mystic to metal separators for fuel cells, Developed a coating that has both corrosion resistance and conductivity

Performance data

DOE Technical Targets for Polymer Electrolyte Membrane Fuel Cell Components

**Anodic polarization test**
pH3 H2SO4 + 0.1ppmHF, 80℃, Ar purge,
Scanning speed1mV/s, -0.6V to +2.0V(Ag/AgCl)

**Constant potential polarization test**
pH3 H2SO4 + 0.1ppmHF, 80℃, Ar purge,
After 3 hours of natural soaking +0.6V(Ag/AgCl)72h

**Contact resistance change @ immersion test**
pH3 H2SO4, 80℃, 168h immersion

**Change in contact resistance @ constant potential polarization test**
Above evaluation

Contact for "Mistic"

＜New Business Development Division＞
Tel : +81-778-51-5000 → ９ → Extension number 317
Fax : +81-778-51-4710
Person in charge : Mr. Osada
E-meil : Takuya_Hisaka@eyetec.co.jp