Salt spray resistant Salt spray test chamber in the specific key efficacy

First, the necessity of salt spray test box Salt spray test box salt spray test is a key way to evaluate the corrosion resistance of commodities or raw materials to resist corrosion and erosion work, and the rationality and rationalization of
its experimental results are very critical.

There are many reasons for the reliability and integrity of the salt spray test results, so it is necessary to improve the effectiveness of the salt spray test results and to improve the experimental technicality
.

Therefore, the experimental staff must not only have solid professional skills and professional and technical personnel, but also have a variety of social experience and a comprehensive grasp of the goods
.

From the organic chemistry and environmental protection engineering, raw materials, structure and processing technology and other multi-clock industries to understand the salt spray test of the salt spray test box, scientifically and standardize the experimental results, as soon as possible for the commodity selection, overall design, processing technology selection, commodity delivery storage and application to show reasonable information content, improve the corrosion resistance of commodities or raw materials to resist corrosion and erosion work capabilities
.

Second, the salt spray test chamber in the specific efficacy of the salt spray test box is the key to the use of salt spray test box to create an environmental simulation corrosion resistance natural environment standards to evaluate the corrosion resistance of commodities or metal composite materials corrosion resistance of the natural environment experiment, it is divided into two categories, one for the natural environment exposure experiment, the other for the artificial service to accelerate the simulation of corrosion resistance natural environment experiments, environmental simulation corrosion resistance natural environment experiment is the use of this kind of experimental equipment with the necessary capacity indoor space - Salt spray resistance test box, in its capacity indoor space with manual service, resulting in a corrosion-resistant natural environment to the commodity corrosion resistance corrosion resistance quality evaluation, it is compared with the natural environment, its corrosion resistance to the natural environment chlorine, can be the usual natural environment corrosion resistance water content of several times or several times, so that the erosion rate is further improved, the product to carry out salt spray test, calculate the results of the time is also greatly shortened, when the natural exposure to the natural environment of a commodity to carry out experiments, It will take 1 year for it to be eroded, and experiments under the natural environmental standard of environmental simulation corrosion resistance can obtain similar results in 24 hours
.

The salt spray test is used in the salt spray test chamber to carry out the salt spray test, including the neutral salt spray test, the acetate spray test, the copper salt accelerated acetate spray test, and the alternating salt spray test
.

1.
Neutralized salt spray test (NSS experiment) is the emergence of the early stage of the main use of this accelerated erosion experiment method, it selects 5% salt solution, aqueous solution ph value in the neutralization category (6 ~ 7) as an aqueous solution for the sprayer, the experimental temperature is taken 35 ° C, the specified corrosion-resistant foundation settlement rate in the middle
of 1 ~ 2ml / 80cm2.
h.

2.
Acetate spray test (ASS experiment) is the basic development trend of neutral salt spray test, which is to add some glacial acetic acid in the 5% salt solution, so that the pH value of the aqueous solution is reduced to 3 or so, the aqueous solution becomes acidic and alkaline, and the corrosion resistance produced after it is also changed from neutral salt spray to acid and alkalinity, and its erosion rate is 3 times faster than that of the NSS experiment
.

3.
Copper salt accelerated acetate spray test (CASS experiment) is the recent overseas development trend of this rapid corrosion resistance erosion experiment, the experimental temperature is 50 °C, the salt solution added a small amount of copper salt --- copper chloride, obviously causing erosion, its erosion rate is about 8 times
that of NSS experiments.

4.
Alternating salt spray test is this comprehensive salt spray test, it is actually a neutral salt spray test plus stable cold and humidity experiment, it is mainly used for the entire equipment commodity in the mouth type, according to the infiltration of the tidal natural environment, so that corrosion resistance is not only caused by the surface of the finished product, but also caused by the inside of the finished product, which is to evaluate the electrical and physical properties of the entire equipment commodity after the replacement of the two natural environment standards of corrosion resistance and cold and wet
。