Coating process: coating film detection - dry film weight test

Key tips: 1 Sample preparation with coating Coating test: 12 × K-bar A4 paper sample iron sheet Coating sampling steps: ① Before preparing the coating sample, the coating shall be coated on the A4 iron sheet for drying to obtain the test sample ② Preparation of iron sheet: cut iron sheet (generally 20 × 30cm) according to the size of A4 paper The surface of iron sheet shall be flat and smooth without oil stain or scratch ③ Drop a small amount of paint on the front end of the iron sheet, and use a 12 × K-bar bar bar to transfer the paint from the front end to the back end Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Coating home news: 1 Coating test with coating: 12 × K-bar A4 paper sample iron sheet coating sampling steps: ① prepare coating sample, before coating on A4 iron sheet, dry the coating, and obtain the test sample ② Preparation of iron sheet: cut iron sheet (generally 20 × 30cm) according to the size of A4 paper The surface of iron sheet shall be flat and smooth without oil stain or scratch ③ Drop a small amount of paint on the front end of the iron sheet, and use a 12 × K-bar bar bar to smooth the paint from the front end to the back end The thickness of coating can be controlled by different types of k-Bar Generally, 12 × K-bar -- 14 × K-bar are commonly used ④ Put the coated iron into the oven, and adjust the baking temperature according to the different coating 2 Test and weighing method for dry film weight of coating (1) coating instrument: electronic analytical balance butanone acetone (2) steps: ① clean three 50 × 50 mm test pieces cut from the designated position with acetone and dry them naturally, weigh them with analytical balance, and measure the value to the fourth decimal place ② Then apply butanone MEK on the film, wipe off with "coffee sugar" until the film is completely removed, and wipe it with a paper towel (or use the third method below) ③ in the solution of 3% - 5% sodium carbonate heated to 90-95 ℃, take the test piece as the cathode, stainless steel as the anode, and use 4v-6v DC voltage to remove the film After removing the film, gently remove the film with a small clip until it is completely removed and quickly washed and dried After this process, the surface of tinplate does not strain black ④ After drying and cooling, the test piece that has been removed from the film shall be weighed again, and the measured value shall be to the fourth decimal place ⑤ subtract the second weighing value from the first weighing value, and then multiply by 400 to obtain the value of the film amount (g / M 2) The film amount of the test piece shall be the arithmetic mean value of the three test pieces Dry film weight (g / m2) = (gross weight of coated iron sheet - net weight of iron sheet) / area of iron sheet ⑥ film thickness is expressed by film amount (g / m2) According to the classification thickness, film amount (g / m2) is the same as plate difference (g / M2) a10.0-12.01.5 b6.5-8.01 c3.0-4.00.8 dry film weight tester test (1) coating instrument: dry film weight tester (2) step: Put the probe of the paint tester on the sample piece and press it down On the tester, look at the position of the pointer directly and read the value directly The value is the dry film weight It should be the arithmetic mean of the three measured points Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,