Common knowledge of coating: leak detection control of floor coating in heavy-duty anti-corrosion coating

Core tip: the harm of floor paint coating missing (1) In the coating, drying or curing process of floor paint, defects often appear, hiding air or solvent, and forming holes or bubbles in the film; (2) When the coating is dry, the migration of air or solvent will cause pinholes and bubbles; the irregular and uneven surface of the coating will also cause small spots or holes in the coating; (3) Physical damage after coating, such as scratches, etc., are the causes of missed coating When there is leakage coating, corrosive media such as oil, water, acid, gas, etc invade the interior of the coating or even the substrate through pinholes or holes, making the coating Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Paint Home News: the damage of floor paint coating omission (1) in the process of floor paint coating, drying or curing, defects often occur, hiding air or solvent, and forming holes or bubbles in the film; (2) when the coating is dry, the air or solvent migration leads to pinholes and bubbles; the surface of the coating is irregular, uneven will also cause small points or holes in the film; (3) Physical damage after coating, such as scratches, etc., are the causes of missed coating When there is leakage coating, the corrosive media such as oil, water, acid, gas, etc invade the interior of the coating or even the substrate through pinholes or holes, so that the coating loses the shielding effect, causing filiform corrosion and weakening the surrounding protective layer If not repaired in time, these areas will become local corrosion and corrosion process, which will make the coating fall off It is very important to check the missed coating, pinhole and hole of the coated object in severe corrosion environment, such as the surface continuously immersed in corrosion solvent, so as to discover the hole in time, remedy it in time and guarantee the coating quality How to detect the leakage of floor paint coating? For most non-conductive coatings with total dry film thickness ≤ 20MIL (508 μ m), a low-voltage, wet sponge type leakage detector is required; for non-conductive coatings with total dry film thickness > 20MIL (508 μ m), a high-voltage leakage detector and spark leak detector are required Both of them work in the same principle The instrument directly or indirectly contacts with the substrate When the electric shock moves over the coating surface, any discontinuity in the coating will make the current flow to the substrate to form a path At this time, the instrument will send out an acoustic signal and sparks will appear at high voltage When the signal is sent, observe the coating and indicate with oil-free chalk for repair and recheck How to repair the missing coating? When checking the coating or lining for missing coating, mark the missing coating area with oil-free chalk If there are several holiday areas on a total area, circle the whole area Repair the missed areas and repaint the large areas to meet the technical specifications and factory instructions After the repair layer is fully cured, the leakage inspection shall be carried out again In case of dense pinholes, the coating or lining shall be removed and recoated Note: for different types of coatings, the voltage used should be based on the empirical value, which can be appropriately different; Especially for chlorinated rubber, vinyl chloride, acrylic acid and other one-component solvent volatile coatings, it takes two weeks or more for them to completely dry to form a hard coating Unlike epoxy and other two-component curing coatings, the leakage test is generally arranged after the completion of the whole project for a period of time 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,