The peeling and flaking of dry film lubricant will not only reduce the lubrication effect, but also affect the normal operation of the equipment. To solve this problem, it is necessary to start with the cause of the peeling and take targeted repair measures to restore its protective and anti-friction properties.
First of all, when the dry film lubricant is found to be peeling and flaking, it is necessary to check whether there are omissions in the construction process. If the surface of the workpiece is not thoroughly cleaned before coating, and residual oil, dust or oxide layer remains, the dry film will not be firmly bonded to the substrate. In this case, the surface of the workpiece needs to be pretreated again. Use a special cleaner to remove oil stains, and remove the oxide layer and impurities by sandblasting, grinding, etc. to ensure that the surface is clean, dry and has appropriate roughness, creating good conditions for re-coating the dry film.
Secondly, whether the selection of dry film lubricant is suitable for the working conditions is also crucial. Different types of dry film lubricants are suitable for different temperatures, loads and friction environments. If a heat-resistant dry film is used in a high-temperature environment, or a product with insufficient strength is used on a high-load equipment, it is easy to cause the dry film to fail prematurely. At this time, it is necessary to replace the appropriate type of dry film lubricant according to the actual operating conditions of the equipment. For example, a dry film containing high temperature resistant ingredients should be selected for high temperature environments, and an enhanced formula product should be used for high load occasions.
Improper coating process may also cause dry film peeling. Whether it is spraying, brushing or dipping, if the coating is too thick or uneven, it will affect the adhesion and stability of the dry film. During repair, if the coating is too thick, you can first use sandpaper or special tools to carefully polish and remove the excess; if the coating is uneven, you need to re-coat. During the coating process, the viscosity of the coating, spraying pressure or brushing force must be strictly controlled to ensure that the coating is thin and uniform, so that the dry film can fully adhere to the surface of the workpiece.
The impact of environmental factors on dry film lubricant cannot be ignored. A humid environment may cause the metal substrate to rust, thereby separating the dry film from the substrate; a strong chemical corrosion environment will erode the dry film components and reduce its performance. For humid environments, the workpiece can be treated with anti-rust treatment before applying the dry film, such as spraying anti-rust primer; for chemical corrosion environments, in addition to selecting a dry film with strong corrosion resistance, you can also consider adding a protective shell to the equipment to isolate external corrosive substances and reduce damage to the dry film.
Mechanical wear is also a common cause of dry film peeling. When the friction and collision between equipment components are too intense, the loss of dry film will be accelerated. In this case, it is necessary to check the operating status of the equipment, adjust the matching clearance between components, repair severely worn parts, and ensure smooth operation of the equipment. At the same time, the coating thickness of the dry film can be appropriately increased in the easily worn parts, or multi-layer coating can be used to enhance the wear resistance of the dry film.
During the repair process, attention should also be paid to the curing conditions of dry film lubricant. Some dry films require specific temperature and time for curing. If the curing is not sufficient, the strength and adhesion of the dry film will be affected. Therefore, after re-coating, it is necessary to strictly follow the requirements of the product manual to control the curing environment and time. If necessary, heating, baking and other methods can be used to assist curing so that the dry film can reach the best performance state.
When the dry film lubricant peels or flakes off, it is necessary to comprehensively analyze the causes from multiple aspects such as construction process, product selection, environmental factors, and equipment operation status, and take corresponding repair measures. Only by standardizing the construction process, selecting appropriate products, and improving the operating environment can the dry film peeling problem be effectively solved, its lubrication and protection functions be restored, and the normal operation of the equipment be guaranteed.
