The difference in the preparation of the salt spray test chamber samples greatly affects the reproducibility of the test results. Therefore, you should pay attention to the correct treatment method, or adopt a processing mode negotiated by both parties to reduce the difference of test results. The main points worth noting are the following two points: 1) Surface quality: During the sampling or sample preparation process, the coating should be scratched or the surface should have obvious defects, which will affect the test results. 2) Scratch condition: When the sample is broken, the selection of the scribing tool, the depth and geometry of the scratch will affect the test results. Therefore, the use of special scribing tools is particularly important, as shown in the table below. As can be seen from the table below, although the specifications of the scribing tools are not identical in the two standards, the blades are required to have a certain angle, and any knives, razors, and knives cannot achieve the V-shaped incision effect. Therefore, it is not suitable for use. Ma Steel's laboratory uses a pen-type single-edged cutter that meets the standard. GB/T 1771 ASTM B117 Single-edged cutter and cutting edge are 20°～30° for scribing tools (according to GB/T 9286) Turning tool or pen type tool with tungsten carbide tip (according to ASTM D 1654) Scratch depth line should be smoothed to the substrate The scribing is a V-shaped incision, which should penetrate the organic coating, and the degree of scribing through the coating is negotiated by both parties. For the depth of the scratch, the provisions in both standards require that the coating be scratched. Since most of the substrates used in the current color-coated plates are hot-dip galvanized sheets, the galvanized layer can be drawn according to standard requirements without special provisions. However, in the operation, since the scale is not well controlled, it is recommended to adopt a method of negotiating by both parties, and the scratch depth is defined as penetrating the plating layer so that the scribe line is a uniform bright line without burrs to avoid scribe lines. Different conditions have an impact on the consistency of test results.
Our bathroom storage collection organizes your essentials, so everyone can calmly find what they are looking for even during the hectic morning rush hour. Our versatile selection features options for bathrooms of every size and design including everything from linen cabinets to shelf units, storage mirrors to bathroom carts. Just take some measurements and browse through our full supply to find the best fit for your space, all at our signature low affordable prices.
Bathroom Storage Cabinets,Bathroom Storage Tower,Freestanding Bathroom Cabinet,Tall Bathroom Storage Cabinet HOPE IKEA , https://www.skyfurnishing.com