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Metal spring clean the surface of the test method?
by：Yongqiang
2020-11-16
Spring metal surface plating and organic coating shall meet with (
Plating)
Layer of dense, uniform, combined with matrix solid requirements.
The coating (
Plating)
In such as coating layer (
Plating)
Layer falls off, bubbling or hair flower and local coating layer, etc. , in most cases are due to the metal coating (
Plating)
Before the surface caused by unclean.
Compared with organic solvent coating, water as the solvent of spring metal surface coating processing, such as electroplating, anodic oxidation, phosphating and coating of coating on the surface of metal organic pollutants are more sensitive, even a monolayer of pollutants, is likely to lead to the failure of the whole process.
Therefore, material, surface coating (
Plating)
After pretreatment of cleanliness is very important.
1, the method of visual and optical
light metal spring on the surface of the oil can be used to the naked eye, and with the aid of a magnifying glass or optical microscope to observe. The downside is passive oxide film on the surface of the metal and extremely thin oil will check. Of rough and polished metal surface, the above method is powerless, but can be by using a clean, white cotton, cloth, paper to wipe the surface, and then looked at whether it is clean, to determine whether the metal surface is clean.
2, surface applanation tonometry method
according to the surface oil on its surface energy, through the metal in a series of surface tension of liquid infiltration in different test to determine its surface energy, on the basis of judgment of its surface cleanliness. Such as match into acetic acid from 80% to 20% water) ( V/V) To series of 99% 1% ethanol water solution, its surface tension from 24 accordingly. 5×10- 5 n/CM increased to 66. 0×10- 5N/CM。
3, paint,
will be in addition to the oil drops on the surface of metal springs, and then to dry, if no traces, the surface is clean, such as a circle indicates there is oil.
4, wetting,
clean metal surface is hydrophilic, therefore, can be completely wet by water, when the metal surface containing oil, there will be not by water infiltration water area. Based on the principle of whether hydrophilic, in addition to the most commonly used simple expiratory method and atomizer spray method, there are several kinds of detection means. Due to metal oxide film is hydrophilic, therefore, this kind of method mostly cannot detect whether the oxide film on the surface of the metal net.
Dongguan Yongqiang spring hardware Co.,Ltd.’s administrative systems and management team are extraordinary-you'll need them to get a new location up and running.
Dongguan Yongqiang spring hardware Co.,Ltd. seeks to lead the industry by instilling pride in our customers, creating value for the market and sharing responsibility around the world.
Dongguan Yongqiang spring hardware Co.,Ltd. deems that we can drive consumer transactions using high-tech tools like artificial intelligence and cognitive data sets.
A primary strategy is superior customer satisfaction. Dongguan Yongqiang spring hardware Co.,Ltd. constantly analyzes market needs around the world to develop a full range of products for different use.
We believe in keeping the customers happy and providing them with News at a very competent price.
1, the method of visual and optical
light metal spring on the surface of the oil can be used to the naked eye, and with the aid of a magnifying glass or optical microscope to observe. The downside is passive oxide film on the surface of the metal and extremely thin oil will check. Of rough and polished metal surface, the above method is powerless, but can be by using a clean, white cotton, cloth, paper to wipe the surface, and then looked at whether it is clean, to determine whether the metal surface is clean.
2, surface applanation tonometry method
according to the surface oil on its surface energy, through the metal in a series of surface tension of liquid infiltration in different test to determine its surface energy, on the basis of judgment of its surface cleanliness. Such as match into acetic acid from 80% to 20% water) ( V/V) To series of 99% 1% ethanol water solution, its surface tension from 24 accordingly. 5×10- 5 n/CM increased to 66. 0×10- 5N/CM。
3, paint,
will be in addition to the oil drops on the surface of metal springs, and then to dry, if no traces, the surface is clean, such as a circle indicates there is oil.
4, wetting,
clean metal surface is hydrophilic, therefore, can be completely wet by water, when the metal surface containing oil, there will be not by water infiltration water area. Based on the principle of whether hydrophilic, in addition to the most commonly used simple expiratory method and atomizer spray method, there are several kinds of detection means. Due to metal oxide film is hydrophilic, therefore, this kind of method mostly cannot detect whether the oxide film on the surface of the metal net.
Dongguan Yongqiang spring hardware Co.,Ltd.’s administrative systems and management team are extraordinary-you'll need them to get a new location up and running.
Dongguan Yongqiang spring hardware Co.,Ltd. seeks to lead the industry by instilling pride in our customers, creating value for the market and sharing responsibility around the world.
Dongguan Yongqiang spring hardware Co.,Ltd. deems that we can drive consumer transactions using high-tech tools like artificial intelligence and cognitive data sets.
A primary strategy is superior customer satisfaction. Dongguan Yongqiang spring hardware Co.,Ltd. constantly analyzes market needs around the world to develop a full range of products for different use.
We believe in keeping the customers happy and providing them with News at a very competent price.
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