Shallow cryogenic treatment: effect on the corrosion resistance and hardness properties of AA5083-H111 alloy in chloride-ions enriched medium
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IOP Publishing Ltd
Abstract
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The influence of cryogenic and cryogenic time (10, 24, 36, 48, and 72 h) on the hardness, surface
roughness, and corrosion resistance properties of AA5083-H111 alloy in 3.5 wt.% NaCl solution have
been investigated. The hardness property was analysed via the Brinell hardness measurement, the
corrosion resistance property was measured electrochemically, while the morphological studies were
undertaken using the SEM (scanning electron microscopy) and atomic force microscopy (AFM). The
results disclose that the shallow cryogenic treatment at−80°Cimproves the alloy’s hardness, surface
roughness, and the corrosion resistance. The best cryogenic treatment time is 24 h. Cryogenic
treatment for 24 h increases the alloy’s hardness from 71.3HBto 74.90 HB, reduces the average surface
roughness from 534.000nmto 105.634 nm, and increases the total charge transfer resistance from
18139Ωcm2 to 26230Ωcm2. The improvement is linked to settling of fine particles on the alloy
surface. The SEM results support these claims.
Keywords
QD Chemistry