(Rev.1) ISO Standard for Surface Preparation, DFT measurement, Defect decision, Adhesion Test and Holiday Test

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The painting company should carry out the following test activities in accordance with the following ISO standard or ITP (Inspection and Test Plan).

1) Surface preparation quality

① Grade of cleanliness: according to ISO 8501-1.

② Cleanliness: no grease or oil, dust level 2 maximum according to ISO 8502-3.

③ Surface profile: according to ISO 8503-5 Sa 2 1/2 (Equivalent: SSPC-SP10).

2) Salt contamination: According to ISO 8502-6 and 8502-9, The salt level-50mg/㎡ maximum for exposed atmosphere. 20mg/㎡ maximum for immersion area and internal lining

3) Adhesion Test according to ISO 4624 and/or ISO 2409.

4) Holiday test: No detection according to ASTM D5162 (for immersion area, internal lining and Underground items)

5) For inorganic zinc silicate: MEK test according to ASTM D4752.

6) Dry film thickness: According to ISO19840

7) Wet film thickness: According to recommend by paint manufacturer.

8) Application Environmental [including Weather (Climate) Condition]: Ambient Temperature, Relative Humidity, Dew point, Surface Temperature, Etc.

9) Equipment Check: Compressor Air with accessories, etc.

10) Abrasives

11) Paint Materials: Type of Paint (Label), Condition, Self Life, Batch No., etc.

12) Appearance of Paint Film: Running & Sagging, Cracking, Mottling, etc. (each Coat)

13) Color Code and ID: Indicated Color for Items and Safety Color

14) Final Inspection: Total Appearance and Test Result of Paint


Rev.1 / Jan. 4th 2022 / Blue Color Text


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