Wuxi Dongao Nonferrous Casting Co., Ltd.
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Talking About The Four Reasons For The Change Of Valve Castings
- Jun 21, 2017 -

In the field of machining, due to the particularity of the valve castings, in the course of the use of the phenomenon of blackening, which is why? What are the reasons for this?

1, their own internal reasons. Many of the valve castings manufacturers in the die-casting, machining, will not do any cleaning work, and some even just a simple water impulse, these are difficult to do thoroughly clean. The die castings on the surface of the release agent, cutting fluid, saponification fluid and other corrosive substances and other stains, will speed up the casting moldy point black speed.

2, the impact of the external environment. In a certain temperature and humidity conditions, the casting will be prone to oxidation of black or moldy situation, in fact, this is determined by the characteristics of the casting itself.

3, the process design is unreasonable. Valve castings in the cleaning or inspection after the improper handling, will mold mold, black to create a certain condition to accelerate the formation of its mildew. And if the choice of cleaning agent has a strong corrosive, it may also cause corrosion corrosion of castings.

4, warehousing management is not in place. The castings are stored in different heights of the warehouse, and their mildew is also different.