Salt spray chamber after the metal surface treatment of various materials, including architectural coatings, electrical degrees, inorganic and organic chemical coating, anodizing, anti-rust agent corrosion solution, the detection of its resistance to corrosion Crafts corrosion can . Then, after the salt spray test over a period of time, how do you know the test after the salt spray test is not pass?
Salt spray test head to a commodity for evaluation of corrosion-resistant metal or composite material etching quality, and salt spray test result judgment is judgment on the quality of the product, its determination result is not a valid right, it is appropriate to consider goods or metal anti-corrosion-resistant material erosion of the quality of important. Analyzing the test results of salt spray test methods are: classification determination method, determination weighing method, etching method was determined occurs, data analysis etching.
1), a rating is determined
Is the percentage of the total area of etched area ratio according to a division manner have a good number of levels, to a certain level as determined in accordance with passing it suitable to carry out the test tablet reviews.
2), weighing Analyzing
Is to carry out weighing the way around, according to NW etching experiments of the test, measure the net weight by the erosion damage to the quality of anti-corrosion test conducted assessment, it is well suited for certain types of corrosion-resistant metal material to carry out quality evaluation.
3), corrosion
This judgment is the judgment of law, it is resistant to erosion after the experiment, merchandise is not caused by erosion of the situation to carry out the judge, product performance standards usually choose this way for most of the test.
4), corrosion statistics
Salt spray chamber to produce a design of experiments erosion, erosion statistical data analysis, statistical data the way clear erosion of confidence, it is mainly used for analysis, statistical analysis etching condition, rather than actual for a real judge the quality of goods. Referring generally standardized salt spray test has ISO4628-3, ASTM B117, MIL-STD-810F, IEC60068-2-11, JIS-Z2371, JIS-G3141, GBT 2423.17, GJB 150.1, MIL-STD-883E and the like. Must be carefully peruse the contents of the specification, is very certain overseas specification or manufacturing industry or manufacturer (eg: versatility, Guangzhou Honda and other specifications are not necessarily the same) and then clear the way.