ASTM D3359-09 标准试验方法 胶带法测量附着力(2)

2019-01-12 17:00

备注5:——如需要或已列明,规定,涂层测试板在进行测试前可能需先暴露于/ 如:浸在水中,盐雾或高湿度中。浸泡的时间和条件应取决于涂层产品的最终用途或者买方和卖方之间达成的协议。 7. Procedure 程序

7.1 Select an area free of blemishes and minor surface imperfections. For tests in the field, ensure that the surface is clean and dry. Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating.

在实地做此试验时,需确保试样涂层表面要清洁干燥。高温和高湿会影响胶带附着力。

7.1.1 For specimens which have been immersed: After immersion, clean and wipe the surface with an appropriate solvent which will not harm the integrity of the coating. Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller. 根据买方和卖方之间双方达成的协议,对于被浸泡的样件,浸泡完以后用适当的溶剂(不能损害涂层)擦净表面,然后让其干燥

7.2 Make two cuts in the film each about 40 mm (1.5 in.) long that intersect near their middle with a smaller angle of between 30 and 45°. When making the incisions, use the straightedge and cut through the coating to the substrate in one steady motion. 用刀具沿直线稳定地切割漆腊至底材,夹角30-45°,划线40mm长,交叉点在线长的中间

7.3 Inspect the incisions for reflection of light from the metal substrate to establish that the coating film has been penetrated. If the substrate has not been reached make another X in a different location. Do not attempt to deepen a previous cut as this may affect adhesion along the incision.

用灯光照明查看钢质基底的反射,确定划痕是否到底材,如果没有,在不同位置再划一个X。不要试图加深以前切口的深度,这样可能影响切口处的附着性。

7.4 Remove two complete laps of the pressure-sensitive tape from the roll and discard. Remove an additional length at a steady (that is, not jerked) rate and cut a piece about 75 mm (3 in.) long.

除去压敏胶带上面的两圈,然后以稳定的速率拉开胶带,剪下长约75mm胶带。

7.5 Place the center of the tape at the intersection of the cuts with the tape running in the same direction as the smaller angles. Smooth the tape into place by finger in the area of the incisions and then rub firmly with the eraser on the end of a pencil. The color under the transparent tape is a useful indication of when good contact has been made. 把胶带中间放在切割处的交叉点上,用手指压平,为了保证胶带与涂层接触良好,再用铅笔顶端的橡皮

擦用力摩平胶带,透过透明胶带析颜色可以帮助我们看出与漆膜接触的状态密实程度

7.6 Within 90 ±30 s of application, remove the tape by seizing the free end and pulling it off rapidly (not jerked) back upon itself at as close to an angle of 180° as possible. 在贴上胶带90±30 秒内,扯住胶带悬空的一端,快速地并尽可能确保拉力沿180的方向进行撕离胶带。 7.7 Inspect the X-cut area for removal of coating from the substrate or previous coating and rate the adhesion in accordance with the following scale: 按照下列标准进行检查底材涂层脱落的X切口面积情况: 5A No peeling or removal,没有脱皮或脱皮

4A Trace peeling or removal along incisions or at their intersection, 沿刀痕或在其交叉口处有脱皮或脱落的痕迹

3A Jagged removal along incisions up to 1.6 mm (1/16 in.) on either side, 刀痕两边都有缺口状脱落达1.6mm

2A Jagged removal along most of incisions up to 3.2 mm (1/8 in.) on either side, 刀痕两边都有缺口状脱落达3.2mm

1A Removal from most of the area of the X under the tape, 胶带下的X区域内大部分脱落

0A Removal beyond the area of the X. 脱落面各超出X区域。

7.8 Repeat the test in two other locations on each test panel. For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface.

在每个测试板的另外两个地方重复测试。对大型结构需充分试验以保证了粘合力评估以代表整个表面。 7.9 After making several cuts examine the cutting edge and, if necessary, remove any flat spots or wire-edge by abrading lightly on a fine oil stone before using again. Discard cutting tools that develop nicks or other defects that tear the film.

切割了几个切口以后,检查切口边,如果需要,使用以前用油石轻微磨擦去除斑点、除尖角 Report 报告

8.1 Report the number of tests, their mean and range, and for coating systems, where the failure occurred that is, between first coat and substrate, between first and second coat, etc.

记录试验的数次及相关意思和范围,对于涂层系统,失效发生在哪里,发生在第一个涂层和基体之间,

还是在第一与第二涂层之间。

8.2 For field tests report the structure or article tested, the location and the environmental conditions at the time of testing. 实地测试时,报告需注明涂层系统、施工时间、固化情况。

8.3 For test panels report the substrate employed, the type of coating, the method of cure, and the environmental conditions at the time of testing.

记录测试板所用的底材,涂层的类型,处理的方法,和试验时的环境情况。

8.4 If the adhesion strength of the tape has been determined in accordance with Test Methods D 1000 or D 3330, report the results with the adhesion rating(s). If the adhesion strength of the tape has not been determined, report the specific tape used and its manufacturer.

如果胶带的附着力已确定符合D 1000 或者 D 3330,记录附着力等级的结果。如果胶带附着力大小未确定,记录所使用的胶带细节及其生产厂家。

8.5 If the test is performed after immersion, report immersion conditions and method of sample preparation.

如果试验在浸泡以后再进行,记录浸泡的条件和试样准备方法。 9. Precision and Bias

8

精度和偏差

9.1 In an interlaboratory study of this test method in which operators in six laboratories made one adhesion measurement on three panels each of three coatings covering a wide range of adhesion, the within-laboratories standard deviation was found to be 0.33 and the between-laboratories 0.44. Based on these standard deviations, the following criteria should be used for judging the acceptability of results at the 95 % confidence level: 在多个实验室进行的测试方法。操作者在6个实验室内的3个平板上(各涂层上进行一系列附着力测量,做同一个附着力测试。在同一个实验室的标准偏差为0.33,在不同实验室发现偏差为0.44.以这些标准偏差为基础,以下标准应该用来确定结果的可行性有95%的可信度。

9.1.1 Repeatability—Provided adhesion is uniform over a large surface, results obtained by the same operator should be considered suspect if they differ by more than 1 rating unit for two measurements.

重复性:假定在一个大表面的附着力是一致的,同一个操作者两次测量得到的结果差异超过一个单位等级,那麽将被认为是不可信的。

9.1.2 Reproducibility—Two results, each the mean of triplicates, obtained by different

operators should be considered suspect if they differ by more than 1.5 rating units. 再现性:取每个操作者3次测量的均值,如果得到的两个结果超过1.5个单位等级,那麽将被认为是不可信的。

9.2 Bias cannot be established for these test methods. 用这些测试方法不能确定偏差。

TEST METHOD B—CROSS-CUT TAPE TEST 测试方法B:划格法胶带测试 10. Apparatus and Materials 器具和材料

10.1 Cutting Tool9—Sharp razor blade, scalpel, knife or other cutting device having a cutting edge angle between 15 and 30° that will make either a single cut or several cuts at once. It is of particular importance that the cutting edge or edges be in good condition. 切割刀具:——锋利的刀刃、手术刀、刀或者其他切削设备(刀刃在15-30度之间),切削单个切口或多个切口。切割边缘情况良好是特别重要的。

10.2 Cutting Guide—If cuts are made manually (as opposed to a mechanical apparatus) a steel or other hard metal straightedge or template to ensure straight cuts. 切割指南:如果是手动切削,钢制或其他金属制的直尺或夹具来保证直线切割。

10.3 Rule—Tempered steel rule graduated in 0.5 mm for measuring individual cuts. 尺子:用刻度为0.5mm间距的尺子 10.4 Tape, as described in 5.3. 胶带:见5.3

10.5 Rubber Eraser, on the end of a pencil. 铅笔一头的橡皮擦

10.6 Illumination, as described in 5.5. 照明描述见5.5

10.7 Magnifying Glass—An illuminated magnifier to be used while making individual cuts and examining the test area. 放大镜——照明放大器。 11. Test Specimens 试样

11.1 Test specimens shall be as described in Section 6. It should be noted, however, that multitip cutters10 provide good results only on test areas sufficiently plane that all cutting edges contact the substrate to the same degree. Check for flatness with a straight edge such as that of the tempered steel rule(10.3).

试样要求需同第6部分。应当记录,只有当试验区域足够平使切口在同一程度接触底材时,得到好的结果。

12. Procedure程序

12.1 Where required or when agreed upon, subject the specimens to a preliminary test before conducting the tape test (see Note 3). After drying or testing the coating, conduct the tape test at room temperature as defined in Specification D 3924, unless D 3924 standard temperature is required or agreed.

当需要或已达成协议时,进行试验以前样本要经过初步测试(见注3)。经过烘干或涂层检验,按照D3924(如需要或达成协议)中要求的室温进行胶带试验。

12.1.1 For specimens which have been immersed: After immersion, clean and wipe the surface with an appropriate solvent which will not harm the integrity of the coating. Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller. 根据买方和卖方之间双方达成的协议,对于被浸泡的样件,浸泡完以后用适当的溶剂(不能损害涂层)擦净表面,然后让其干燥

12.2 Select an area free of blemishes and minor surface imperfections, place on a firm base, and under the illuminated magnifier, make parallel cuts as follows:

选择一个无瑕疵和表面无小缺陷的区域,平稳地放在照明放大镜下,按如下所示平行切割:

12.2.1 For coatings having a dry film thickness up to and including 2.0 mils (50 μm) space the cuts 1 mm apart and make eleven cuts unless otherwise agreed upon. 使涂层漆膜表面干燥,包括50um的空间切口距离1mm,有11个切口,或者协商确定。

12.2.2 For coatings having a dry film thickness between 2.0 mils (50 μm) and 5 mils (125 μm), space the cuts 2 mm apart and make six cuts. For films thicker than 5 mils use Test Method A.11

漆膜厚度2.0 mils (50 μm)-5 mils (125 μm)之间,划6个切口,每个切口间距2mm,涂层漆膜厚度大于5 mils用测试方法A11.

12.2.3 Make all cuts about 20 mm (3.4 in.) long. Cut through the film to the substrate in one steady motion using just sufficient pressure on the cutting tool to have the cutting edge reach the substrate. When making successive single cuts with the aid of a guide, place the guide on the uncut area.

切口长20mm。匀速的切割漆膜,刀刀见铁(直透底材表面)

12.3 After making the required cuts brush the film lightly with a soft brush or tissue to


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