This document specifies a method for using phase-sensitive eddy-current instruments for non-destructive measurements of the thickness of non-magnetic metallic coatings on metallic and non-metallic basis materials such as:<\/p>\n
zinc, cadmium, copper, tin or chromium on steel;<\/p>\n<\/li>\n
copper or silver on composite materials.<\/p>\n<\/li>\n<\/ol>\n
The phase-sensitive method can be applied without thickness errors to smaller surface areas and to stronger surface curvatures than the amplitude-sensitive eddy-current method specified in ISO\u00c2 2360<\/span><\/span>, and is less affected by the magnetic properties of the basis material. However, the phase-sensitive method is more affected by the electrical properties of the coating materials.<\/p>\n In this document, the term \u00e2??coating\u00e2?? is used for materials such as, for example, paints and varnishes, electroplated coatings, enamel coatings, plastic coatings, claddings and powder coatings.<\/p>\n This method is particularly applicable to measurements of the thickness of metallic coatings. These coatings can be non-magnetic metallic coatings on non-conductive, conductive or magnetic base materials, but also magnetic coatings on non-conductive or conductive base materials.<\/p>\n The measurement of metallic coatings on metallic basis material works only when the product of conductivity and permeability (\u00cf?<\/i>,\u00c2 \u00ce\u00bc<\/i>) of one of the materials is at least a factor of two times the product of conductivity and permeability for the other material. Non-ferromagnetic materials have a relative permeability of one.<\/p>\n Non-magnetic metallic coatings on metallic and non- metallic basis materials. Measurement of coating thickness. Phase-sensitive eddy-current method<\/b><\/p>\nPDF Catalog<\/h4>\n
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\n PDF Pages<\/th>\n PDF Title<\/th>\n<\/tr>\n \n 2<\/td>\n National foreword <\/td>\n<\/tr>\n \n 4<\/td>\n European foreword <\/td>\n<\/tr>\n \n 6<\/td>\n Foreword <\/td>\n<\/tr>\n \n 7<\/td>\n 1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n\n 8<\/td>\n 4 Principle of measurement <\/td>\n<\/tr>\n \n 11<\/td>\n 5 Factors affecting measurement uncertainty
5.1 Basic influence of the coating thickness
5.2 Electrical properties of the coating
5.3 Geometry \u2014 Base material thickness
5.4 Geometry \u2014 Edge effects <\/td>\n<\/tr>\n\n 12<\/td>\n 5.5 Geometry \u2014 Surface curvature
5.6 Surface roughness
5.7 Lift-off effect <\/td>\n<\/tr>\n\n 14<\/td>\n 5.8 Probe pressure
5.9 Probe tilt
5.10 Temperature effects
5.11 Intermediate coatings
5.12 External electromagnetic fields
6 Calibration and adjustment of the instrument
6.1 General <\/td>\n<\/tr>\n\n 15<\/td>\n 6.2 Thickness reference standards
6.3 Methods of adjustment <\/td>\n<\/tr>\n\n 16<\/td>\n 7 Measurement procedure and evaluation
7.1 General
7.2 Number of measurements and evaluation <\/td>\n<\/tr>\n\n 17<\/td>\n 8 Uncertainty of the results
8.1 General remarks
8.2 Uncertainty of the calibration of the instrument <\/td>\n<\/tr>\n\n 18<\/td>\n 8.3 Stochastic errors <\/td>\n<\/tr>\n \n 19<\/td>\n 8.4 Uncertainties caused by factors summarized in Clause 5
8.5 Combined uncertainty, expanded uncertainty and final result <\/td>\n<\/tr>\n\n 20<\/td>\n 9 Precision
9.1 General
9.2 Repeatability (r) <\/td>\n<\/tr>\n\n 21<\/td>\n 9.3 Reproducibility limit (R) <\/td>\n<\/tr>\n \n 23<\/td>\n 10 Test report <\/td>\n<\/tr>\n \n 24<\/td>\n Annex A (informative) Eddy-current generation in a metallic conductor <\/td>\n<\/tr>\n \n 30<\/td>\n Annex B (informative) Basics of the determination of the uncertainty of a measurement of the used measurement method corresponding to ISO\/IEC Guide 98-3 <\/td>\n<\/tr>\n \n 32<\/td>\n Annex C (informative) Basic performance requirements for coating thickness gauges based on the phase-sensitive eddy-current method described in this document <\/td>\n<\/tr>\n \n 34<\/td>\n Annex D (informative) Examples for the experimental estimation of factors affecting the measurement accuracy <\/td>\n<\/tr>\n \n 39<\/td>\n Annex E (informative) Table of the student factor <\/td>\n<\/tr>\n \n 40<\/td>\n Annex F (informative) Example of uncertainty estimation <\/td>\n<\/tr>\n \n 43<\/td>\n Annex G (informative) Details on precision <\/td>\n<\/tr>\n \n 45<\/td>\n Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" \n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n BSI<\/b><\/a><\/td>\n 2019<\/td>\n 46<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":321642,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[442,2641],"product_tag":[],"class_list":{"0":"post-321633","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-25-220-40","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/321633","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/321642"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=321633"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=321633"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=321633"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}