With the continuous development of modern industry, alloy workpiece has been widely used in many fields with its excellent performance. However, in the surface treatment process of alloy workpiece, chemical degreasing is an essential and important process. Corrosion sometimes occurs after chemical degreasing of alloy workpieces, which makes many engineers and technicians very confused. Below we will discuss the root cause of this problem from various perspectives.
Causes of corrosion during chemical degreasing
1. Acidity and alkalinity of chemical degreasers
In the chemical degreasing process of alloy workpieces, the commonly used degreasing agent is usually a strong base or strong acid. However, for sensitive alloy materials, such as zinc alloy, aluminum alloy and brass, if the use of too strong or inappropriate degreasing agents, the surface of these alloys will be corroded. The research shows that the corrosion is mainly due to the strong acid-base of the oil remover, which destroys the oxide layer on the surface of the alloy, thus triggering the corrosion reaction
2. Control of degreasing time and temperature
The time and temperature of chemical degreasing are critical to controlling the corrosion phenomenon. If the degreasing time is too long, or the temperature is too high, the driving force of the chemical reaction increases, and instead of better removing the oil, corrosion of the alloy surface is enhanced. Proper process control can effectively minimize corrosion problems.
3. Impact of process water quality
The process water quality in the chemical degreasing process, if it contains more impurities or is contaminated, will accelerate the corrosion reaction of the metal. Fu Jiaxia in the "acidic bright copper plating process research" article pointed out that certain impurity ions in the water quality may be involved in the chemical reaction, change the direction and rate of reaction, which in turn leads to corrosion.
Solutions
The advantage of using Bigely alloy chemical degreasing powder BC-1103 is that in order to effectively solve the corrosion problem that may occur in the chemical degreasing process of the alloy workpiece, choosing the right chemical degreasing agent is the key. BC-1103 has the following three advantages:
1. No harm to the alloy substrate
Bigely BC-1103 oil removal powder is specially designed for sensitive alloys, and its formulation is gentle and does not destroy the oxide protective layer on the alloy surface, thus effectively preventing corrosion.
2. Remove oil thoroughly, improve the quality of coating
The use of BC-1103 ensures that the surface of the alloy workpiece is thoroughly clean, providing a good basis for subsequent electroplating or painting. This can not only improve the coating adhesion, but also improve the uniformity and reliability of the coating.
3. Cost savings
Choosing the right degreasing powder BC-1103 can reduce the defective rate caused by corrosion in the chemical degreasing process, thus reducing the processing cost and improving the economic efficiency.
Conclusion
Corrosion of alloy workpieces after chemical degreasing can be caused by a variety of factors, including the choice of chemical degreaser, control of degreasing time and temperature, and the influence of process water quality. The use of Bigelow's alloy chemical degreasing powder BC-1103 is the ideal solution to avoid corrosion problems while removing oil thoroughly. This not only helps to improve the plating quality, but also saves cost effectively and ensures the plating quality of alloy workpieces.
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