Salt spray test of coated and non coated steels

Presentation for participants

Reference of the ILC:

CO21FS

   

References of test methods:

ISO 9227  ASTM B117  ISO 2808  ASTM B659  ASTM D1186  ISO 2813
ASTM D523  ISO 7724 Parts 1, 2 & 3  ISO 11664 Parts 1 & 4
ASTM E308  ISO 2409  ASTM D3359 Met. B  ISO 10289
ISO 4628 Parts 1 to 8  ASTM D610  ASTM D714  ASTM D1654

References of test methods for which the ILC can indirectly provide an assessment of performance

ISO 17872

 

These may be superseded standards, which some of the reference standards may have replaced, or EN or ASTM or ISO standards that are close but not exactly equivalent to the reference standards.

   

Frequency:

Each year

                       

Main characteristics:

NSS (Neutral salt spray) - Loss of mass in a fixed exposure time, before and after removing the corrosion products. Selected exposure times: 48h (non coated samples) and 168h (coated samples).

Other characteristics:

A (against ISO 10289), Percentage of corroded surface (zinc coated sample) - Rating of defects due to ageing in accordance with ISO 4628-2, -3 and -8 - Cross-test against ISO 2409 (paint coated sample)

 

Caution: The number of determinations may be low for the secundary characteristics, what may make inefficient the comparison between laboratories

   

Format of the test results:

Results of some properties are numerical and some are expressed as a choice between several possibilities (categories).

   

Determination of the assigned values (“true values” for each characteristic):

By statistical computation of the totality of the results with possible selection on competence criteria (accreditation, validation by a reference body, quantity of tests performed in the year), test to detect possible collusion, merging of results not obtained in reproductibility conditions, suppression of technically unvalid results.

   

Type of statistical computation:

For numerical results, the statistical computation will provide an assigned value with its attached uncertainty, values of standard deviations for repeatability and reproductibility, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.

 

For results expressed as a choice between several possibilities (categories), Gower indexes are computed from the results, which enables the calculation of assigned values, repeatability and reproducibility standard deviations, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.

Number of products submitted to tests:

3

Number of samples per participation:

6

Max number of operators per participation:

1 (it is necessary to order as many participations as there are participating test operators)

Product submitted to tests:

For this ILC, 3 different products (uncoated steel, galvanised steel, painted steel) are provided for testing.

Type of samples:

Plates

Approximate dimensions of samples:

150x100x1 mm

Specific preparation to be performed by the participant:

Protection of edges

                   

Special notice for this ILC:

3 series of samples are provided: one series of uncoated samples (exposure 48h), one series of zinc coated samples (exposure 28x24h), one series of paint coated samples with a scribe against ISO 17872 (exposure 28x24h)

   

Time schedule:

 

Opening date of registrations

15/09/2020

Registration deadline

15/03/2021

Date of shipment of samples

05/06/2021

Start of the tests

15/09/2021

Deadline for carrying out the tests and providing the results

31/10/2021

Date of delivery of reports

15/12/2021

Note: After the deadline, registrations are only accepted within the limit of availability of samples

                       

Price (€)

300

Price if online payment (€)

240

Approximate weight (kg)

3