Nd-Dy-Fe-B-X (X=Zr,Hf) alloys were exposed to severe corrosion conditions and the corrosion rates were followed by various techniques (electrochemistry, Tafel extrapolation mehod). The weight loss ...was measured over a period of 10 weeks in a wet corrosion chamber. Corrosion products were analysed using X-ray diffraction and the microstructures were investigated by optical microscopy and on SEM-EDS. In agressive mesia, such as diluted NaCl or ▫$H_2So_4$▫, the differences between the corrosion rates were small. The lowest potential difference between the anodic phase (corrosion products) and the matrix, acting as cathode, was observed in Nd-Dy-Fe-B-Zr alloys. Corrosion rates in fresh water were 0,30 mm/year for Nd-Dy-Fe-B alloy and 0,02 mm/year for Nd-Dy-Fe-B-Zr alloy. The same trend was shown on samples exposed to conditions of simulated condensed atmospheric humidity. The highest cumulative weight loss occured with pure Nd-Dy-Fe-B alloys and the lowest with the alloy improved by ▫$ZrO_2$▫ addition. The corrosion rates for three different alloys were 0,089 mm/year for Nd-Dy-Fe-B alloy, 0,072 mm/year for Nd-Dy-Fe-B-Hf alloy and 0,063 mm/year for Nd-Dy-Fe-B-Zr alloy.
It was not necessary to add the material to the shelf.
Bibliographic material was successfully added on shelf.
Adding bibliographical material on shelf was not successful.
Material is already on the shelf.
Permalink
URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year
Impact factor
Edition
Category
Classification
JCR
SNIP
JCR
SNIP
JCR
SNIP
JCR
SNIP
Select the library membership card:
DRS,
in which the journal is indexed
Database name
Field
Year
Links to authors' personal bibliographies
Links to information on researchers in the SICRIS system
Subject headings in COBISS General List of Subject Headings
Select pickup location
The material from the parent unit is free. If the material is delivered to the pickup location from another unit, the library may charge you for this service.
