1.1 This International Standard specifies the
methods of integranular corrosion testing for
solution heat-treatable aluminium alloys without
protective coatings.
The sensitivity of solution heat-treatable
aluminium alloys to intergranular corrosion is a
function of the alloy chemical composition, method
of manufacturing, solution heat treatment, quench
treatment and artificial precipitation hardening
(ageing) treatment.
In the naturally aged condition, the sensitivity of
solution heat-treatable aluminium alloys to
intergranular corrosion is a function primarily of
the rate of cooling during quenching over a critical
temperature range.
1.2 This International Standard is applicable to cast
and wrought heat-treatable aluminium alloys in the
form of castings, forgings, plates, sheets, extrusions
and semi-finished or finished parts, in order to carry
out comparative assessment of alloys of different
grades and thickness depending on their chemical
composition and other factors, and also to check the
thermal processing quality of the tested materials.
The test results provide information to determine
the intergranular corrosion resistance and thermal
processing quality of the tested materials.
1.3 The test results cannot be regarded as absolute,
because they are not applicable to all environments
that can be met in service. They are best used in a
relative manner, to compare the intergranular
corrosion resistance of various heats of solution
heat-treatable aluminium alloys.
EN ISO 11846:2008 Referenced Document
ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
ISO 8044:1989 Corrosion of metals and alloys; vocabulary
ISO 8407:1991 Corrosion of metals and alloys; removal of corrosion products from corrosion test specimens
EN ISO 11846:2008 history
2008EN ISO 11846:2008 Corrosion of metals and alloys - Determination of resistance to intergranular corrosion of solution heat-treatable aluminium alloys