KS M ISO 19840:2013 Paints and varnishes ㅡ Corrosion protection of steel structures by protective paint systems ㅡ Measurement of, and acceptance criteria for, the thickness of dry films on rough surfaces
This standard includes calibration of the instrument used, definition of the inspection area, sampling plan, measurement method, acceptance/rejection criteria, and specifies procedures for verifying specified dry film thickness on rough surfaces. For the purpose of this standard: The specified thickness applies the specified value defined in KS M ISO 12944-5, and the dry film thickness is usually the thickness above the height of the high point of the surface roughness. The procedures described in this standard apply to permanent magnets, electromagnets, and eddy current types. Based on the use of measuring instruments. The accuracy of the measuring instrument is checked by the zero point on a smooth surface and the known thickness and adjusted if necessary. Therefore, the measured result on a coating on a rough steel substrate is greater than the actual value above the peak height of the surface roughness. Dry film thickness is defined as the instrument reading minus the appropriate correction. The dry film thickness is obtained by applying the appropriate correction to the calibrated reading on a smooth, flat steel surface. When specifying or agreeing on adjusted individual readings on steel surfaces, it is important to acknowledge that this method is not suitable for this standard. This standard is applicable when the specified dry film thickness is greater than 40.m. .
KS M ISO 19840:2013 history
2023KS M ISO 19840-2023 Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Measurement of, and acceptance criteria for, the thickness of dry films on rough surfaces
0000 KS M ISO 19840-2013(2018)
2013KS M ISO 19840:2013 Paints and varnishes ㅡ Corrosion protection of steel structures by protective paint systems ㅡ Measurement of, and acceptance criteria for, the thickness of dry films on rough surfaces
2011KS M ISO 19840:2011 Paints and varnishes-Corrosion protection of steel structures by protective paint systems-Measurement of, and acceptance criteria for, the thickness of dry films on rough surfaces