How to treat the sample before the salt spray test Before using the salt spray test chamber for the salt spray test, the sample must be properly cleaned according to the nature of the coating and the degree of cleanliness, and the abrasive and corrosive or inhibitory solvents should not be used for cleaning. The method must not damage the surface. As for stainless steel specimens, nitric acid was used for cleaning and passivation. After washing the sample (through the water-based test), wipe the moisture off with a clean cloth or blotting paper, or dry it with dry oil-free air. Note: Magnesium oxide paste was used as a last resort. This paste was prepared by adding 10 g of reagent grade magnesium oxide to 100 ml of distilled water. Unless otherwise specified, specimens shall be cut and the exposed part of the substrate shall be caused by hooking, or the coating shall be trapped due to identification marks. A suitable protective layer shall be applied to the test. Such as hard wax (ceresinwax) vinyl tape and other insulation. Handprint contamination can cause serious adverse test results. The sample should not be contaminated with any handprint after cleaning. In the test, the location of the test specimen in the salt spray test chamber shall meet the following conditions: 1. The main surface of the specimen is inclined from 15° to 30° to the plumb line, and it should be parallel to the main flow direction of the spray when viewed from above the test chamber. When a particular part has major surfaces with many directions that need to be tested at the same time, it may be desirable to place multiple pieces of the sample so that each main surface can simultaneously receive salt water spray. 2, the arrangement of the sample. The spray should be allowed to fall freely on all test strips. The free flow of the anti-coagulation spray should not be allowed to fall. 3. Samples subjected to the salt spray test shall not be in contact with each other, nor may they come into contact with metallic conductors or substances that are subject to capillary action, as well as anything other than support frames. 4. The saline solution should not drip from one sample to other samples. 5, sample identification number or assembly hole should be covered in the bottom. Exposed Handle,Industrial Handle,Brass Handle,Furniture Handle Guangdong Haitan electric cabinet lock Co., Ltd , https://www.htcabinetlock.com