国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
前言
国际标准化组织 (国际标准化组织) 是国家标准机构的全球联盟 (ISO成员机构). 国际标准的制定通常通过ISO技术委员会进行. Interested in the subject of which a technical committee has been set up for each of the members have the right to send representatives to attend in the committee. 与标准化组织联络的政府和非政府国际组织也参与了这项工作. ISO with the international electrotechnical commission (国际电工委员会) has electrician standardized all items close cooperation.
International standards are drafted according to the rules given in Part 2 ISO/IEC 指令的.
技术委员会的主要任务是制定国际标准. Technical committee through the draft international standards will be distributed to the members of the organization. As members of the international standard release need at least 75% of the agency for approval.
国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
Please note that some of the contents of this document may belong to the patent right topic. ISO 不负责识别任何或所有此类专利权.
国际标准化组织 19840 由ISO/TC技术委员会制定 35, Paints and varnishments, 小组委员会SC 14, Protective coating Systems for steel Structures.
Second edition cancel and replace the first edition (国际标准化组织 19840:2004), the first edition on technical and edit the revised as follows:
A) improve the description of the principle of the measurement method in 4.2;
乙) introduced the eddy current measuring equipment instructions (看 5.2.4);
Figure 1 C) has nothing to do with the language;
d) In line A8 of Annex E, references to lines A7 and A8 have been corrected to A6 and A7;
e) In line B1 of Annex E, the reference to ISO 8503-1 has been corrected to read “relevant parts of ISO 8501”;
F) A bibliography is added for reference to ISO 8501-1 to ISO 8501-4.
国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
介绍
This international standard complements the ISO 12944 series of standards for measurement and acceptance of dry film thickness. If the specified or agreed, this standard can also be used in other applications.
The goal of this international standard is measurement on rough surface coating dry film thickness uniformity of practice. The chosen method requires the measurement of dry film thickness using a measuring instrument based on the principle of permanent magnet and induction magnet. Can use instruments using eddy current principle, but they are usually used in non-ferrous metal surface.
If the coating is applied to a rough steel substrate, the measurement of its dry film thickness is more complicated than that of a smooth surface. Rough steel substrates include substrates prepared by sandblasting cleaning or abrasion.
The influence of surface roughness on the measurement results increases with the depth of the profile, but the results also depend on the design of the measurement probe and the thickness of the coating.
Appendix A is informative and is a method based on adjusting the instrument to a known thickness on a rough surface. 在这种方法中, no correction values are used. 在本标准中, a single reading is used. Annex B describes a method of reading many times. The methods in Annexes A and B are used only when specified or agreed.
国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
1 范围
This international standard specifies the validation according to the nominal dry film thickness on the rough surface dry film thickness of the program, including the definition of the adjustment of the instruments used, inspection area, sampling plan, measurement methods and acceptance/reject criteria.
For the purpose of this standard, any given thickness are regarded as defined in ISO 12944-5 of the nominal thickness, dry film thickness is peak above the typical thickness of surface profile.
The procedures described in this standard are based on instruments using permanent magnets, electromagnets and eddy current types. Instrument accuracy is verified at zero and known thickness on a smooth surface and adjusted if necessary.
As a result, the rough on the coating on steel substrate for measuring the peak value of outline will be higher than the actual value. The dry film thickness above the profile peak was defined as the instrument reading minus the appropriate correction value.
Dry film thickness is using in smooth and flat steel based on the surface of readings to adjust the appropriate correction.
If specified or agreed on a single reading based on adjustment on a smooth, flat steel surface without the use of correction values, it is important to recognize that the method does not comply with this international Standard.
If the nominal dry film thickness of 40 microns or larger, this standard applies.
Note that if the nominal thickness is less than the surface roughness of the substrate, the measurement uncertainty will increase.
国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
2 规范性引用文件
本文件的应用需要以下参考资料. 对于注明日期的参考文献, only for reference version. 对于未注明日期的参考文献, 引用的新版本 (包括任何修订) 适用.
国际标准化组织 2808, 油漆和清漆 — 薄膜厚度的测定
国际标准化组织 8503-1, preparation before coating of paint and related products of steel matrix – shot blast cleaning of steel substrate surface roughness properties – 部分 1: to evaluate the ISO surface profile of sandblasting the surface cleaning specification and the definition of the comparator
国际标准化组织 12944-1, 油漆和清漆 – Corrosion protection of steel structures through protective coating systems – 部分 1: 总体介绍
国际标准化组织 12944-2, 油漆和清漆 – 通过防护涂层系统对钢结构进行腐蚀防护 – 部分 2: 环境分类
国际标准化组织 12944-3, 油漆和清漆 – 通过防护涂层系统对钢结构进行腐蚀防护 – 部分 3: Design considerations
国际标准化组织 12944-4, 油漆和清漆 — 通过防护涂层系统对钢结构进行腐蚀防护 — 部分 4: Types of surfaces and finishes
国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
国际标准化组织 12944-5, 油漆和清漆 — Corrosion protection of steel structures with protective coating systems — 部分 5: Protective coating systems
国际标准化组织 12944-6, 油漆和清漆 – through the protective coating system for steel structure corrosion protection – 部分 6: laboratory performance test methods
国际标准化组织 12944-7, 油漆和清漆 – through the protective coating system for steel structure corrosion protection – 部分 7: paint job execution and supervision
国际标准化组织 12944-8, 油漆和清漆 – 通过防护涂层系统对钢结构进行腐蚀防护 – 部分 8: Development of new work and maintenance specifications
国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
3 术语和定义
就本文件而言, the following terms and definitions apply.
3.1 Dry film thickness EF5
When coating hardening residual film thickness on rough surface peak
3.2 Personal Reading
The number displayed by the film thickness meter
3.3 Corrected value
Allow the effect of sandblasting or other rough surfaces on the film thickness meter reading
3.4 separate dry film thickness
A single reading is subtracted from the corrected value
3.5 Average dry film thickness
Arithmetic mean of all individual dry film thicknesses in the detection area
3.6 nominal NDFT dry film thickness
For each layer of coating or the specified dry film thickness of the coating system, in order to achieve the required durability
3.7 Inspection Area
Sampling plan for its designated area, can be the entire structure or part of the whole structure
国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
3.8 sampling plan
A plan that defines the number of measurements to be made on the inspection area
3.9 adjust
The process of aligning the readings of a dry film thickness gauge with known thickness values to improve the accuracy of a thickness gauge on a specific surface or within a specific part of its measuring range
3.10 Surface profile
The microscopic roughness of the surface
笔记 1: This is usually expressed as the height of the main peaks relative to the main valleys.
12] [来源: 国际标准化组织 8503-1:
国际标准化组织 19840-2012 “Chinese Paints and varnishes-Criteria for the measurement and acceptance of dry film thickness on rough surfaces”
3.11 最大干膜厚度
The maximum allowable dry film thickness beyond which the performance of the paint or paint system may be impaired
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