Salt spray testing

We carry out salt spray testing in laboratory according to the NF EN ISO 9227 and NF EN ISO 60068-2-11 standards.

Salt spray testing: study of corrosion phenomena

The durability of a material or a product has always been at the center of the concerns of buyers around the world. The use of metallic materials has many mechanical advantages that we cannot do without in all sectors of activity.

The main drawback is its sensitivity to oxidation in a corrosive atmosphere, which has an impact on the product in terms of aesthetics and mechanical characteristics.

In order to limit the phenomena of oxidation of metallic materials, it is necessary to choose an appropriate protection (surface treatment or paint) which will allow to meet the life of the product.

Performing neutral salt (NSS) or acetic (AASS) fog tests in the laboratory makes it possible to check the corrosion resistance of an assembly or sub-assembly in order to:

Determine areas susceptible to corrosion
Checking the effectiveness of a protective paint
Qualify the choice of a surface treatment
Compare the performance of parts from different suppliers
Study the evolution of a corrosion phenomenon

Expose materials to a saline or corrosive atmosphere

Illustration: comparative shots of 4 different types of protection on steel sheets.

Standards

Neutral or acetic salt spray tests can be carried out according to standards DO-160, ISO 9227, ASTM B117, D17-1058 (RENAULT and PSA), ISO 60068, etc.

Cycled salt spray tests

The 6NAPSE Group also performs cycled salt spray tests on large and heavy parts.

Indeed, the resistance of the products to various conditions is an essential step to be validated. The different cycles necessary for the validation of a product can include:

Neutral salt spray cycle (NSS)
Acetic salt spray cycle (AASS) : NSS solution + glacial acetic acid
Forced drying cycle (or forced convection)
One humidification cycle (Temperature/Humidity)
Dry air cycle
Rinse cycle
Water spray cycle
…

essais de corrosion au brouillard salin, salt spray testing, QFOG

essais de corrosion au brouillard salin, salt spray testing

5 chambers	Temperatures	Dimensions	Admissible mass
E-060 : BS-SSC 400 DYCOMETAL 2036-04	Ambient air at +50°C	750 x 1070 x 550	?
E-197 : BS-SSC 1000 DYCOMETAL 3424-14	Ambient air at +50°C	820 x 1600 x 640	?
E-217 : BS 610 1000 ERICHSEN 556	Ambient air at +50°C	1100 x 1000 x 800	150kg distributed max
E-249 : BS-SSC 2000 DYCOMETAL 04164-19	Ambient air at +50°C	1000 x 1800 x 990	80kg max
Q-FOG CRH1100-HSC	Salt spray-Humidity : ambient air at +60°C Shower : ambient air at +50°	144×80×46 cm (57×32×18 in)	500kg distributed max

Analyses et Surface laboratory has COFRAC accreditation (Accreditation n°1-1720 – scope available on www.cofrac.fr) for neutral salt spray corrosion tests according to NF EN ISO 9227 and NF EN standards 60068-2-11.