Would you like to conduct salt spray testing according to ISO 9227?
Assess the corrosion resistance of your materials, coatings and surface treatments through salt spray testing according to ISO 9227
Corrosion can quickly compromise the performance, appearance and service life of a metal component or protective system. To assess corrosion resistance under accelerated exposure conditions, salt spray testing is a widely used method in industry.
At FILAB laboratories, salt spray tests according to ISO 9227 are used to characterize the behaviour of metallic materials, coatings and surface treatments exposed to a controlled saline atmosphere.
ISO 9227: what does salt spray testing involve?
The ISO 9227 standard specifies the general conditions for conducting neutral salt spray (NSS), acetic acid salt spray (AASS) and copper-accelerated acetic acid salt spray (CASS) tests.
The test involves exposing specimens in a controlled chamber in which a saline solution is sprayed as a mist. The exposure time is defined according to the test protocol and the purpose of the study.
This accelerated exposure is used in particular to:
- compare the corrosion resistance of several materials or coatings;
- assess the effectiveness of an anti-corrosion treatment;
- identify the appearance of red or white corrosion;
- observe blistering, flaking or coating degradation;
- check the durability of a surface protection;
- compare different suppliers or treatment processes.
FILAB supports you with salt spray testing according to ISO 9227
Which materials and coatings can be tested?
Metals and alloys
- steels and stainless steels ;
- aluminium and alloys aluminium alloys ;
- copper and alloys copper alloys ;
- metal parts produced using various industrial processes.
Coatings and surface treatments
- metallic coatings;
- conversion treatments;
- passivation;
- anodizing;
- paints and organic coatings;
- multilayer anti-corrosion systems;
- surface treatments designed to improve corrosion resistance.
The different types of salt spray testing according to ISO 9227
The NSS (Neutral Salt Spray) test uses a saline solution under neutral conditions. It is a commonly used method for assessing and comparing the corrosion resistance of metallic materials and coatings.
The AASS (Acetic Acid Salt Spray) test acidifies the test environment to create more aggressive conditions. This method may be used in particular for certain decorative coatings or specific protective systems.
The CASS (Copper Accelerated Acetic Acid Salt Spray) test adds copper chloride to the saline solution, creating a particularly corrosive environment.
The choice between NSS, AASS and CASS depends on the material, coating, industrial sector and standards applicable to the product.
Why choose FILAB for your salt spray testing according to ISO 9227
With a team of engineers and PhDs in metallic materials, the FILAB laboratory puts its knowledge and expertise at your disposal to carry out salt spray tests on your metal parts in accordance with ISO 9227 and any other standard based on your needs.
We offer tailored support, customized to your needs, to help improve your production processes and thus prevent failures.
To support you under the best possible conditions, the FILAB laboratory is approved for the Research Tax Credit (CIR) and accredited COFRAC ISO 17025.
Our FAQ
To receive a quote from the laboratory, you can contact our teams via our contact form, by telephone or by email.
Simply send us your requirements (material type, requested analysis, applicable standard, urgency, number of samples, etc.). We will then send you a customized technical and pricing proposal within 24–48 hours.
Analysis turnaround times at the FILAB laboratory vary depending on the type of analysis and the complexity of the expertise project.
FILAB is nevertheless committed to providing fast turnaround times tailored to your industrial constraints and urgent requirements.
The salt spray test is an accelerated corrosion test used to assess the performance of metallic materials, with or without protective coatings, when exposed to a controlled saline atmosphere. ISO 9227 defines, in particular, the NSS, AASS and CASS methods.
ISO 9227 does not specify a universal exposure time for each product. The duration must be defined in the specification applicable to the product or in the test requirements.
The test can reveal the onset and progression of corrosion phenomena, as well as certain discontinuities, pores or defects present in metallic, organic or anodic coatings, or conversion coatings.
The NSS method corresponds to neutral salt spray and is used in particular for metals, alloys and various protective coatings. The AASS and CASS methods use more specific environments and are particularly suited to certain decorative coatings and systems applied to aluminium.
Yes. The test can be supplemented by characterisation techniques used to identify or better understand degradation phenomena: microscopic observation, elemental analysis, surface characterisation or identification of corrosion products. This approach goes beyond a simple visual assessment.
