Résumé:
Austenitic 304L and 316L stainless
steel disks are exposed to the r
eactive species formed in a low
temperature gliding arc plasma in humid air under atmospheric pressure. The plasma treatment which
induces corrosion phenomena and phase transformation is electrochemically controlled by following the
corrosion parameters E
corr
and I
corr
. They respectively increase and decr
ease with the treatment time t. X-
ray diffraction analysis of the treated samples shows a decrease of the amount of the ferrite phase (
α
-Fe)
for the 304L steel vs t, suggesting the transformation of the phase, and its complete disappearance after 1
hour for the 316L steel. The austenitic phase (
γ
-Fe) remains predominant for both samples.
The gliding arc treatment of stai
nless steel surfaces in humid air in
creases their corrosion resistance in
aggressive environments by forming improved barrier layers.
