Surface stability of the material
1, depending on the nature of the material,
2, is the surface processing process.
Here are a few main:
1, compared to the nature of stainless steel material is not easy to rust (in fact, rust is a oxidation process) characteristics to ensure its most stable, so it is also most commonly used, "stainless steel" only need to carry out direct surface polishing or drawing, did not change the surface material, or additional coating, but according to the different grades, stability some differences, It's better to call 304 on a daily basis than 201.
Surface after polishing treatment, good material, good processing technology can reach the mirror, but more than copper plating is a bit worse.
2, "Copper" basic use of brass, and surface electroplating chromium treatment, good treatment, can reach the mirror, coupled with the price of copper nature, there will be noble feeling, such as not electroplating treatment, the surface is very easy to raw copper, can not be used, such electroplating layer compared to the iron surface processing a layer of "paint" to be much more reliable, But also depends on the electroplating process, otherwise did not use a few years on the surface will have raw copper and green conditions.
As a result of sanitary ware products commonly used in the "stainless steel" material prices are much lower than copper materials, some manufacturers according to the specific gravity of stainless steel and copper, magnets can not absorb the characteristics of stainless steel materials after electroplating counterfeit said to be "copper" materials made, although the cost of electroplating stainless steel materials is not cheap, but the overall cheaper.
3, about "aluminum", because "pure aluminum" steel strength can not reach the use of the requirements and the surface is very easy to oxidize is not to be used, the use of generally anti-rust aluminum group or hard aluminum group, but it is unlikely to be the use of the same as aerospace equipment in the same aluminum alloy materials It is much more stable than without surface treatment, and there are a variety of surface treatment results, mainly two kinds: one surface looks brighter, one is the surface looks similar to the sub-light, the former surface layer is thin but hard, not easy to scratch.
The latter surface is like adding a layer of coating layer, although thick but will be prone to scratches, the latter surface can be processed into a variety of colors, aesthetic aspects to be better, also calculate the advantages of it.
4, "Iron", because it is easy to rust must go through the surface treatment, divided into chrome or lacquer, compared to the "iron" above the electroplating layer is not "copper" above the electroplating layer to be reliable. Using the lacquer process, the lacquer layer is also easy to scratch, shedding stripping.
But there can be a variety of colors to do beautiful, paint treatment of good life is not short, such as automotive sheet metal paint layer, good more than 10 years also no big problem.
5, "plastic", in terms of steel strength, life is worse than the above metal materials, but engineering plastics in automobiles and other applications are also a lot of factual situation, so that the reliability of the basic can meet the requirements of use, plastic can be processed into a variety of colors, structures, price is also the cheapest characteristics, I would like to temporarily use,
Users who do not use it for long periods of time are a good choice.