This is the reason for the poor adhesion of the ho

2022-08-14
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This is the reason for the poor adhesion of electroplating coating

metal products in natural state have low utilization rate and are easy to cause metal loss. Therefore, the conventional practice is to carry out necessary protective treatment on the metal surface to realize that the metal coating can effectively meet the performance of product appearance, texture, corrosion prevention, wear resistance and other aspects. Among them, electroplating is a commonly used metal surface treatment technology and is also widely used at present

in the production process of electroplating process, such as nickel iron coating, aluminum silver coating, iron tin coating, etc., many manufacturers will encounter a common problem in the construction process: the adhesion of the coating is not good. The main reasons for the poor adhesion of the coating are as follows

poor pretreatment

when we are electroplating the object, the silver plated surface of the object may not be cleaned up in the early stage, the surface may be covered with dust, or there are other chemicals on the surface of the object. As a result, the adhesion of the coating is affected during electroplating

numerous practices have proved that if there are non-metallic substances such as oil stain or rust on the metal surface, although sometimes the coating can be deposited, the flatness, adhesion and corrosion resistance of the electroplated coating will be affected due to the oil stain "interlayer", and even the deposition will be discontinuous, loose, and even the coating will peel off, so that the actual use value will be lost. Therefore, the pretreatment of metal coating has become an important industry. In recent years, Chinese plastic machinery enterprises have expanded their technological operations in the emerging market of extruders

the pretreatment surface technology adopts the two in one technology of degreasing and derusting, which can also be regarded as a short process of energy transmission from the outside to a structural system. By adopting a unique formula, on the one hand, degreasing and derusting are carried out synchronously, from the original four processes of degreasing, water washing, derusting and water washing. On the other hand, if more than 80% of the raw materials are selected, the grade of chemical raw materials can be checked for the following points, which can be added repeatedly, recycled, and saved time, effort, and money. Therefore, the pretreatment with this technology will not produce acid mist, which is conducive to environmental protection, labor protection and production equipment maintenance, and can reduce the consumption of raw materials. It is safe to use, and the product is non combustible, non explosive, non-toxic, tasteless and harmless to human body. It can be widely used in the pretreatment of metal and some non-metal processes such as coating, electroplating, electroless plating, rust prevention and sealing, and surface modification. At this time, it needs to adjust the belt tightness, surface facial mask conversion and so on

electroplating solution factors

in electroplating production, due to various reasons, various harmful impurities enter the electroplating solution. There are many kinds of impurities, including metal impurities, metal oxides, non-metallic impurities, and various insoluble suspended solids, organic impurities, etc. The types of impurities contained in various plating solutions are different, and the tolerance of the same impurity is also different. When one or several harmful impurities accumulate to a certain extent, it will affect the performance of the plating solution and the quality of the coating. Therefore, the plating solution cannot be treated until the impurities accumulate to cause harm

process condition control factors

the control of process conditions directly affects the quality of electroplated coatings. Only by mastering and controlling the process conditions of each plating seed can we obtain high-quality coatings. Temperature, current density, pH value, electroplating time and other process conditions must be matched. For example, when plating hard chromium, the improper combination of temperature and current density has a great impact on the cathode current efficiency, dispersion ability, coating hardness and brightness of chromium plating solution

design factors

product designers often only pay attention to the shape, size, machining accuracy and other factors of product parts in the drawing design process of parts, and do not give much consideration to the machining process of parts, especially the electroplating process, which brings many unnecessary troubles to the electroplating work, and also has a certain impact on the quality of products

production schedule factor

because many parts' processing processes need to be transferred to multiple workshops, electroplating is always an unfinished process. Often, the parts have not arrived at the electroplating workshop, and the assembly workshop has waited for the parts to be assembled. This kind of situation causes the construction period to be too tight, which is often the rush period of continuous shifts, which is easy to cause the electroplating time to fail to meet the process requirements, or the night work light is not good-looking and clear, thus affecting the electroplating quality

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