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

Presentation for participants

                       
 
Reference of the ILC: HS19FS
References of test methods: ISO 6988  ISO 3231  ASTM G87        
Frequency: Each 3 years
Time schedule:  
Opening date of registrations Registration deadline Date of shipment of samples Start of the tests Deadline for carrying out the tests and providing the results Date of delivery of reports
15/12/2018 15/03/2019 20/05/2019 01/06/2019 31/10/2019 15/12/2019
Note: After the deadline, registrations are only accepted within the limit of availability of samples
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
                   
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: Results are numerical. For each characteristic selected by the participant, 1 result shall be provided for each sample. The statistical computation will provide an assigned value with its attached uncertainty, values of standard deviations for repeatability, for reproductibility, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.
Number of samples per participant: 3x6
Product submitted to tests: Coated and not coated steels
Type of samples: Plates
Approximate dimensions of samples: 100x100x5 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)