期刊
SURFACE ENGINEERING
卷 26, 期 6, 页码 463-468出版社
TAYLOR & FRANCIS LTD
DOI: 10.1179/026708410X12550773058144
关键词
Thermal spray; Ni based alloy; Intermetallic compound; Rubber wheel abrasion test; Corrosion resistance
资金
- CNPq [470583/2006-1]
- CAPES
Coatings based on NiCrAlC intermetallic based alloy were applied on AISI 316L stainless steel substrates using a high velocity oxygen fuel torch. The influence of the spray parameters on friction and abrasive wear resistance were investigated using an instrumented rubber wheel abrasion test, able to measure the friction forces. The corrosion behaviour of the coatings were studied with electrochemical techniques and compared with the corrosion resistance of the substrate material. Specimens prepared using lower O-2/C3H8 ratios showed smaller porosity values. The abrasion wear rate of the NiCrAlC coatings was much smaller than that described in the literature for bulk as cast materials with similar composition and one order of magnitude higher than bulk cast and heat treated (aged) NiCrAlC alloy. All coatings showed higher corrosion resistance than the AISI 316L substrate in HCl (5%) aqueous solution at 40 degrees C.
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