Corrosion resistance

When determining the corrosion resistance, hardware parts/components are tested for their resistance to corrosion (rusting) in a corrosion chamber under defined conditions.


The neutral salt spray test (NSS test) is carried out in a corrosion chamber in a controlled
environment. A 5% sodium chloride solution is sprayed in a defined quantity and distribution in the
corrosion chamber.

Usual test durations are 24 h / 48 h / 96 h / 240 h and 480 h.

The corrosiveness of the test samples is assessed on the basis of different criteria depending on the test duration:

– Appearance after the test

– Appearance after removal of superficial corrosion products

– Time period until the first signs of corrosion appear

– Changes in mechanical properties

Building elements / standards

The following building elements can be classified and tested:

Building element Test according to Classification according to
Window fittings, hinges, strike plates, locks, handles, door shields, rosettes and protective fittings DIN EN ISO 9227 – Corrosion tests in artificial atmospheres – Salt spray test

DIN EN 1670 locks

DIN EN ISO 9227 and/or
DIN EN 1627


Excerpt from relevant standards:

corrosion tests in artificial atmospheres – salt spray test

DIN EN 1670
Locks and building hardware – Corrosion resistance
Requirements and test methods

Please do not hesitate to contact us for further technical verification based on
other normative principles.


Minimum requirements in Germany:

Requirements according to class/limit values
 no requirements no requirements



Harald Kopp

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