| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1469836 | Corrosion Science | 2011 | 6 Pages |
The corrosion resistance of a two-layer polymer (silane + parylene) coating, on implant stainless steel was investigated by microscopic observations and electrochemical measurements. Long term exposure tests in Hanks solution revealed that the coating of 2 μm can be successfully used for corrosion protection. However, the addition of H2O2, simulating the inflammatory response of human body environment causes a dramatic destruction of the protective coating. Analysis of the experimental data in terms of circuit models enables proposing a deterioration mechanism. OH radicals formed at the metal surface attack the polymer, thus the deterioration starts from the metal/polymer interface and progress towards the outward surface.
Research highlights► Two-layer (silane + parylene) coating of 2 μm successfully protects implant grade stainless steel surface against corrosion in body fluid. ► Presence of H2O2 simulating inflammatory response of the body causes a dramatic destruction of the coating. ► Degradation process starts at metal/polymer interface and progress towards the outer surface.
