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22. The polarisation curves show that the bare stainless steel and the bare titanium are both passive at the corrosion potential.  Why would you coat the steel in this condition?
23. The problems with stainless steel in NaCl solution arise normally from pitting corrosion. There is no evidence of pitting corrosion in the bare metal polarisation curve.
24. It is hard to see why the testing was carried out in a system where there is no evidence of corrosion.  Although it is clear that the coating increases the resistance to current flow,  it is only shown for the passive region of the metal, which appears pointless.   What would normally be required of such a coating would be resistance to corrosion, which is not shown.  The only real corrosion test in fact was the FeCl3 immersion test.
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