A Preface
ISO (International Organization for Standardization) is a global alliance of national standards bodies (ISO member bodies). The development of international standards is usually carried out through ISO technical committees. Each member institution interested in a subject on which a technical committee has been established has the right to be represented in the committee. Government and non-governmental international organizations that liaize with standardization organizations are also involved in this work. ISO works closely with the International Electrotechnical Commission (IEC) on all matters of electrical standardization.

International standards are drafted according to the rules given in Part 3 of the ISO/IEC Directive.

Draft international standards adopted by the Technical Committee will be circulated to member bodies for voting. As members of the international standard release need at least 75% of the agency for approval.

Please note that some of the elements of this standard may be has been the subject of patent rights. ISO is not responsible for identifying any or all such patent rights.

International standard ISO3892 was developed by Technical Committee ISO/TC 107, Metallic and other inorganic Coatings, Subcommittee SC 2, Coordination of inspection methods and test methods.

Second edition cancel and replace the first edition (ISO 3892:1980), the revised version has been technology.

Warning – The materials, operations and equipment listed in this standard may be dangerous if appropriate precautions are not followed. This international standard is not intended to address all safety issues associated with its use. It is the user’s responsibility to establish appropriate safety and health practices and determine the applicability of international standards before use of regulatory restrictions.

ISO 3892-2000 “Transformation films on metallic materials – Measurement of the mass of the film layer per unit area – gravimetric method”

1 Scope
This standard specifies the gravimetric method for determining conversion coating per unit area on metallic materials.

Method applicable to the

– phosphate coating on steel;

– Phosphate coating on zinc and cadmium;

– phosphate coating on aluminium and its alloys;

– Chromate coating on zinc and cadmium;

– the chromate coating on aluminium and its alloys.

ISO 3892-2000 “Transformation films on metallic materials – Measurement of the mass of the film layer per unit area – gravimetric method”

The method is only applicable to conversion coatings that do not contain any complementary coatings such as oil, water or solvent-based polymers or waxes.

Whether exist in these methods are not indicating measurement area bare spots or thickness is lower than the specified minimum value. In addition, single values obtained from each measurement area is the average thickness of the region. Will not further mathematical analysis on the single value, for example, for the purpose of statistical control.

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