介绍
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. 每个对已成立技术委员会的主题感兴趣的成员机构都有权在该委员会中派代表参加. 与 ISO 联络的国际政府和非政府组织也参与了这项工作. ISO 与国际电工委员会密切合作 (国际电工委员会) 关于电气标准化的所有问题.

国际标准是按照第 2 部分给出的规则起草的。 2 ISO/IEC 指令的.

技术委员会的主要任务是制定国际标准. 技术委员会通过的国际标准草案将分发给各成员机构进行投票. 作为国际标准的出版至少需要获得批准 75% 成员机构数量.

国际标准化组织 4628-6-2011 评估油漆和清漆涂层的老化缺陷数量和大小以及外观均匀变化的强度 – 部分 6: 用胶带法评估粉化程度

请注意，本文档的某些元素可能受专利权保护. ISO 不负责识别任何或所有此类专利.

国际标准化组织 4628-6 由ISO/TC技术委员会制定 35, 油漆和清漆, 分委会SC 9, General Test Methods for paints and varnishes.

第三版取消并取代了经过技术修订的第二版 (国际标准化组织 4628-6:2007). 主要变化如下:

A) The graphic standard (photographic picture) used in the first edition (国际标准化组织 4628-6:1990) has been reinserted because the computer-generated chalk scale used in the second edition (国际标准化组织 4628-6:2007) does not always give the same rating as the scale used in the first edition (see introduction for more details);

乙) Increased the limit of tape transmission, below which powdering is considered to have occurred (看 5.2).

国际标准化组织 4628 consists of the following parts under the general heading: 油漆和清漆 – 涂层降解评估 – Designation of the number and size of defects, 以及外观均匀变化的强度:

国际标准化组织 4628-6-2011 评估油漆和清漆涂层的老化缺陷数量和大小以及外观均匀变化的强度 – 部分 6: 用胶带法评估粉化程度

– 部分 1: General introduction and specification of the system

– 部分 2: 发泡程度的评估

– 部分 3: 锈蚀程度的评估

– 部分 4: Evaluation of degree of cracking

– 部分 5: Assessment of the degree of spalling

– 部分 6: Evaluation of pulverization by tape method

– 部分 7: Evaluation of pulverization by velvet method

– 部分 8: Assessment of the degree of delamination and corrosion around lines or other artificial defects

– 部分 10: 丝状腐蚀程度的评估

介绍
国际标准化组织 4628-1 defines a system for specifying the number and size of defects and the intensity of uniform variation of coatings, and Outlines the general principles for this system. 该系统特别适用于老化和风化引起的缺陷, 以及统一的变化, 比如颜色的变化, 比如发黄.

ISO 的其他部分 4628 提供图形标准或其他方法来评估特定类型的缺陷. Build on existing evaluation plans wherever possible.

The chalk scale used in the first (1990) and third editions of ISO 4628-6 consists of a photographic picture of tape adhering to different numbers of pigment particles. The pigment particles are unevenly distributed on each piece of tape. 尤其, lower ratings (IE。, 1 到 3) give the impression of being cloudy. 然而, all five levels in the scale used in the first edition (1990) and this edition differ enough to allow for visual assessment.

国际标准化组织 4628-6-2011 评估油漆和清漆涂层的老化缺陷数量和大小以及外观均匀变化的强度 – 部分 6: 用胶带法评估粉化程度

The scale used in the second edition (2007) was computer generated. 因此, white dots representing pigment particles are distributed very evenly across the tape, and the results are not all ratings different enough from each other for visual evaluation. While ratings 0,5 到 3 on the black background of the 2007 grade can be well distinguished from each other, it is almost impossible to visually distinguish ratings above 3, 0, especially ratings 4 和 5. On a white background, the difference between ratings 0,5, 1,0, 和 1,5 is not easy to discern. 然而, the difference between ratings 1,5 和 5,0, is more pronounced.

Comparing the 1990 grade with the 2007 年级, a grade 1 in the 1990 grade appears to correspond to a grade 0.5 在 2007, and a grade 2 in the 1990 grade corresponds to a grade 1 在 2007.

所以, it was decided that the 2007 Scale was not suitable for visually assessing the degree of paint powdering across the entire grade scale from 0,5 到 5,0.

Important – In order to assess the degree of pulverization by tape method, it is necessary to use the graphic reference standard included in this part of ISO 4628. Since electronic copies of these standards may change when viewed on screen or printed, it is recommended to use only the graphic standards included in printed copies of this part of ISO 4628 purchased from ISO member bodies or their distributors when comparing test results.

国际标准化组织 4628-6-2011 评估油漆和清漆涂层的老化缺陷数量和大小以及外观均匀变化的强度 – 部分 6: 用胶带法评估粉化程度

1 范围
ISO的这一部分 4628 provides a graphical reference standard for specifying the degree of powderization of paint coatings. It also describes a method to assess the degree of pulverization. When using this method, care needs to be taken to distinguish between true degradation products and adhered dirt, especially in the case of slight powderization.

2 术语和定义
就本文件而言, 以下术语和定义适用.

2.1 Pulverization

The surface of the paint coating appears to be loosely adhered to fine powder, which is caused by the degradation of one or more components

仅标准信息部分是公开的. 查看完整内容, 需要通过官方渠道购买标准.