Salt Spray Tester
Salt Spray Tester Salt spray corrosion test box through the assessment of the material and its protective layer of salt spray corrosion, and similar protective layer of the process of quality comparison, at the same time can assess the ability of certain products salt spray corrosion.
The Salt Spray Tester Salt spray corrosion test box is suitable for parts, electronics Components, metal materials, protective coatings, and industrial products, salt spray corrosion tests.
The Salt Spray Tester Salt spray corrosion test box is use salt spray corrosion test samples that were tested for the reliability of corrosion resistance, salt spray is the atmosphere composed of tiny droplets of salt formed by the dispersion system is an artificial environment three anti-series.
A lot of business products need to simulate the destructive effects of the climate around the sea, so salt spray chambers should go their route.
The salt spray test is divided into two kinds of neutral salt spray and acid salt spray, the difference is in line with the standards and the test methods are different, respectively, “NSS” and “CASS” tests, artificial three weather climate is the most common test method.
Salt spray corrosion
Corrosion is the destruction or deterioration of the material or its properties caused by the environment. Most of the corrosion occurs in the atmosphere, the atmosphere contains oxygen, humidity, temperature changes, pollutants, and other corrosion components and corrosion factors.
Salt spray corrosion is a common and most damaging atmospheric corrosion. Salt spray here refers to the atmosphere of the chloride, its main component of corrosion is the chloride salt in the ocean – sodium chloride, which is mainly derived from the marine and saline areas.
Salt spray corrosion of the metal surface is due to the chloride ions contained in the metal surface through the oxide layer and the protective layer and the internal metal electrochemical reaction.
At the same time, chloride ion contains a certain amount of hydration energy, easily adsorbed in the metal surface pores, cracks displace and replace oxygen in the oxide layer, the insoluble oxide into a soluble chloride, the passive state of the surface into a lively surface. Caused bad product adverse reactions.
Salt spray
Salt spray refers to the dispersion of the system consisting of tiny droplets of salt in the atmosphere. It is one of the three series of artificial environments.
Many enterprises need to simulate the destructive effects caused by the climate around the ocean. The salt spray test simulates this phenomenon of production, so testing equipment – a salt spray chamber came into being.
The salt spray test is divided into two kinds of neutral salt spray and acid salt spray, the difference is in line with the different standards and test methods, also known as the “NSS” and “CASS” tests, the artificial three weather climate is the most common test method.
Box material
The test chamber as a whole enhances the import of PVC rigid plastic sheet, the surface smooth and smooth, anti-aging, corrosion-resistant; easy to clean, no leakage, abandon the surface of the material due to FRP fade, fiber material structure.
Cover material
All transparent imported impact plate manufacturing, easy to test the test sample test conditions
Salt Bucket Material: imported PVC board, oversized salt tank design, to stop the lack of saltwater and interrupt the test
High-pressure air pipe material: brass or rubber tube
Saturated air barrel
Imported high-grade stainless steel (SUS304) board; using Henry’s law, to be heated and humidified, and provide experimental humidity
(Saturated air tank role: for compression into the air heating, humidification, and oil filtration)
Chamber all pipes are thickened fluoro silicone rubber tube, fifteen years can be maintained without aging and cracking.
Salt Spray Tester Salt spray test methods can be done:
LRHS-108-RY, LRHS-270-RY, LRHS-412-RY, copper accelerated vinegar test, high-temperature damp heat test
Test temperature:
a. Neutral salt spray test: Laboratory: 35 ℃ ± 1 ℃, b. Saturated air barrel: 47 ℃ ± 1 ℃,
acid corrosion test:
Laboratory: 50 ℃ ± 1 ℃, b. : 63 ℃ ± 1 ℃, can also be set according to JIS, CNS, and other standards
Salt Spray Tester Salt spray test Guideline
Salt spray test reference standards:
GB / T 2423.17, IEC60068-2-11, ISO4628-3, ASTM B117, JIS-Z2371, JIS-G3141, GJB 150.1, MIL-STD-810F, MIL-STD-883E and so on.
Experimental classification
The natural environment and accelerated simulation
Alias
Artificial salt spray test also includes neutral salt spray test, acetate salt spray test, copper salt accelerated acetic acid salt spray test, and alternating salt spray test.
Methods
Artificial salt spray environment test is to use a certain volume of space for the test equipment – salt spray chamber, in its volume of space within the manual method to cause salt spray environment to the product of salt spray corrosion quality of the quality Conduct assessment.
Compared with the natural environment, the salt concentration of the chloride in the salt spray environment can be several times or several times that of the common natural environment salt spray, so the corrosion rate is greatly increased. The salt spray test is performed on the product to obtain the result The time is also greatly reduced.
Such as natural exposure to a product sample to be tested, to be corrosion maybe 1 year, and an artificial simulated salt spray environment in the test, as long as 24 hours, you can get similar results.
However, artificially accelerated simulation experiments are still different from the natural environment, and therefore can not be replaced.
Category
(1) Neutral salt spray test (NSS test) is the earliest application of accelerated corrosion test and is the most widely used method. It uses a 5% sodium chloride salt solution, the solution PH value in the neutral range (6 ~ 7) as a spray solution. Test temperature is taken at 35 ℃, salt spray sedimentation rate of 1 ~ 2ml / 80cm • h between.
(2) Acetate salt spray test (ASS test) is developed on the basis of a neutral salt spray test. It is in the 5% sodium chloride solution adding some glacial acetic acid, so that the solution PH value of about 3, the solution becomes acidic, and finally, the formation of the salt spray from neutral salt becomes acidic. Its corrosion rate is about 3 times faster than the NSS test.
(3) Copper Salt Accelerated Acetate Fog Test (LRHS-663P-RY) is a newly developed rapid salt spray corrosion test in foreign countries. The test temperature is 50 ° C. A small amount of copper salt-copper chloride is added to the salt solution, which Strongly induced corrosion. It corrodes approximately 8 times faster than the NSS test.
(4) Alternating salt spray test is a comprehensive salt spray test, it is actually a neutral salt spray test plus a constantly hot and humid test. It is mainly used for cavity-type machine products, through the infiltration of the tidal environment, so that salt spray corrosion is not only produced on the product surface but also produced within the product.
It is the product in the salt spray and hot and humid conditions alternately under two environmental conditions, the final assessment of the whole product of electrical and mechanical properties of any change.
Salt Spray Tester Measure to judge
The purpose of the salt spray test is to evaluate the salt spray corrosion resistance of the product or the metal material, and the determination of the salt spray test result is the judgment of the product quality.
Whether the judgment result is correct or not is the correct measure of the product or metal salt spray resistance Corrosion is the key to quality. Salt spray test results to determine the method are rating decision method, weighing judgment method, the determination of corrosive substances, and corrosion data statistical analysis.
Rating judgment
The percentage of corrosion area and the total area ratio according to a certain method are divided into several levels, with a certain level as a basis for determining the pass, which is suitable for flat samples for evaluation.
Salt Spray Tester Salt spray Weighing the decision
Is through the corrosion test before and after the weight of the sample weight method to calculate the weight loss by corrosion to evaluate the quality of the sample corrosion resistance, it is particularly suitable for the corrosion resistance of a metal quality assessment.
Corrosive
Is a qualitative decision method, which salt spray corrosion test, the product is corrosive phenomena to determine the sample, and most of the general product standards use this method.
Corrosion data
Provides methods for designing corrosion tests, analyzing corrosion data, and determining the confidence of corrosion data. It is primarily used to analyze and count corrosion conditions rather than to determine the quality of a particular product.
Product
Salt spray test products need to be some of the main metal products, through testing to examine the corrosion resistance of the product.
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