Published October 2006 | Version v1
Journal article Metadata-only

Corrosion behaviour of [(Fe0.6Co0.4)0.75B0.2Si0.05]96Nb4 bulk glassy alloy in sulphuric acid solutions

Creators

  • 1. Tohoku Univ., Inst. for Materials Research, Sendai, Miyagi (Japan)

Description

The influence of structural changes such as structural relaxation and crystallization on the corrosion behavior of the [(Fe0.6-Co0.4)0.75B0.2Si0.05]96Nb4 bulk glassy alloy has been investigated in aerated 0.1 and 0.5 kmol/m3 sulphuric acid solutions. All tests were carried out with the same materials in different states: as-cast and relaxed glassy and crystalline states. It was found that the multicomponent [(Fe0.6Co0.4)0.75B0.2Si0.05]96Nb4 glassy alloy had an ability to passivation in aerated sulphuric acid solutions irrespective of microstructure. The subsequent complete crystallization of the bulk glassy alloy leads to a significant decrease in corrosion resistance, while appropriate structural relaxation results in an increase in corrosion resistance. The corrosion results were discussed and correlated with the evolution of crystallization processes by means of XRD and DSC. The effect of temperature of the corrosive medium on the corrosion behavior of the as-cast [(Fe0.6Co0.4)0.75B0.2Si0.05]96Nb4 glassy alloy has also been analyzed. (author)

Additional details

Publishing Information

Journal Title
Materials Transactions
Journal Volume
47
Journal Issue
10
Journal Page Range
p. 2566-2570
ISSN
1345-9678

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
38022635
Subject category
S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ANNEALING; AQUEOUS SOLUTIONS; BOROSILICATE GLASS; CALORIMETRY; CASTING; CORROSION RESISTANCE; CRYSTALLIZATION; IRON BASE ALLOYS; METALLIC GLASSES; NIOBIUM BASE ALLOYS; SCANNING ELECTRON MICROSCOPY; SULFURIC ACID; X-RAY DIFFRACTION
Descriptors DEC
ALLOYS; COHERENT SCATTERING; DIFFRACTION; DISPERSIONS; ELECTRON MICROSCOPY; FABRICATION; GLASS; HEAT TREATMENTS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; IRON ALLOYS; MICROSCOPY; MIXTURES; NIOBIUM ALLOYS; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; SCATTERING; SOLUTIONS; SULFUR COMPOUNDS; TRANSITION ELEMENT ALLOYS

Optional Information

Notes
29 refs., 6 figs., 1 tab.