Determination of resistance of a paint coating to water immersion

Presentation for participants

Reference of the ILC: WI19PC
References of test methods: ISO 2812-2            
Frequency: Each 2 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 Partial immersion method - Rating of defects due to ageing in accordance with ISO 4628-2 and ISO 4628-8 - Cross-test against ISO 2409 - Selected exposure time for assessment: 28 cycles of 24h
Other characteristics t (thickness of coating) in accordance with ISO 2808, Rating of defects due to ageing in accordance with ISO 4628-3 to 5, Gloss coefficients G20, G60, G85 in accordance with ISO 2813, Colorimetric parameters L-a-b in accordance with ISO 7724-1 to 3
  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: 6
Product submitted to tests: Paint coating (on steel)
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: The samples are provided with a scribe against ISO 17872