Sulfur dioxide test with condensation of moisture (Kesternich test) of coated and non coated steels

Presentation for participants

Reference of the ILC:

HS-X-FS

   

References of test methods:

ISO 22479  ISO 6988  ISO 3231  ASTM G87  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These may be superseded standards, which some of the reference standards may have replaced, or EN or ASTM or ISO standards that are close but not exactly equivalent to the reference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:

For this ILC, there is a risk that the number of registrations is insufficient. So a pre-registration procedure is put in place, as follows:

 

1 - Participants interested in participating pre-register using the registration form. No invoicing is made for this pre-registration;

2 - When at least 10 potential participants have pre-registered, CompaLab asks each of these pre-registrees to confirm their willingness to participate and what are the characteristics for which they commit to provide results;

3 - If at least 8 participants confirm their intention to participate, the CIL organisation concerned is engaged.

                       

Main characteristics:

Loss of mass in a fixed exposure time, before and after removing the corrosion products. Selected exposure times: 7x24h (non coated samples) and 28x24h (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)

   

Price (€)

350

Price if online payment (€)

280

Approximate weight (kg)

3