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The average rate of collection of solution in each device shall be measured over a minimum period of 24 h of continuous spraying. If the coating on the back or edges of the panel differs from that of the coating product under test, it shall have a corrosion resistance greater than that of the coating product under test.
DIN EN ISO – 盐雾测试_百度文库
Baffles may be used to prevent direct impact of spray on the test specimens, and the use of adjustable baffles is helpful in obtaining uniform distribution of the spray within the cabinet. Before testing, een reference specimens shall be cleaned carefully with a hydrocarbon solvent in order to remove all evidence of dirt, oil, or other foreign matter liable to influence the result of dn corrosion rate determination.
When not specified, this period shall be agreed upon by the interested parties.
The support for the reference specimens shall be made of, or coated with, inert materials such as plastic, and shall be placed at the same level as the test specimens. Weigh the reference specimens to the nearest 1 mg. Iao standard gives an indication of how well a painted surface will resist artificial seawater spray.
The BS and ASTM standards mentioned here are copyright-protected documents and we are not able to provide you with copies.
After cleaning, rinse the reference specimens with fresh solvent and then dry them. The level of the water shall be maintained automatically to ensure adequate humidification. Carry out sio See Bibliography, Reference . In practice this means that the test object must be capable of fitting inside a cube with mm sides.
The scribe mark s shall be parallel to the longer edge of the test panel, unless otherwise agreed. Options include the following:.
Equivalence between ASTM B-117 vs. ISO 9227 NSS
If the pH of the solution initially prepared is 3,0 to 3,1, the pH of the sprayed solution is likely to be within the specified limits.
Henkel to acquire Sonderhoff Group 22nd May Read more. After this procedure, the specimens to be tested are placed in the cabinet. Resistance to Cyclic Salt Spray. From beautiful Pine Beach New Jersey: Something totally different like zinc-alloy dih, organic coatings, etc. The appropriate temperature depends on the pressure used and on the type of atomizer nozzle and shall enn adjusted so that the rate of collection of spray in the cabinet, and the concentration of the collected spray, are kept within the specified limits see 8.
Thoroughly clean don reference specimens with dni appropriate organic solvent such as a hydrocarbon with a boiling point between 60? The test method was developed by British Rail and Mebon Paints and the term Fn is derived from a key concept of this development namely Protection is Adhesion.
The temperature shall be measured at least ? When not specified, this period shall be agreed upon by the interested parties. ASTM G Annex A5 Scope and Field Application This is a less severe version of the standard salt spray tests and is generally regarded as giving a better correlation with outdoor exposure results.
We also offer cyclic prohesion testing. The prohesion test is a less severe version of the standard salt spray tests and is generally regarded as giving a better correlation with outdoor exposure results. Previous editions DIN You may also wish to consider the prohesion test as a possible alternative. Rin benchmarking performance is something iiso different. A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
Check the pH using electrometric measurement at 25? Dear Brian and Davey, Thank you very much for your answers. As a complement to the reference?
DIN EN ISO (en)_百度文库
In addition, for quality control purposes, comparison can be made between specimens coated with the same coating. We use this method mainly for testing electrical components and switchgear.
Annex D gives supplementary information needed for testing of test panels with organic coatings. Possible changes in pH may result from loss of carbon dioxide from the solution when it is sprayed. These tests give an indication of how well a painted surface will resist salt water spray. You will then need to talk to your customer about the possibility of using one specification in lieu of the other.
The standard states that the test cycles specified have been found useful for testing air-drying industrial maintenance coatings on steel. Axalta opens fin India headquarters 10th May Read more. To determine the corrosivity of the tests, reference-metal specimens of steel shall be used.
After it has been confirmed that the test conditions are within a specified range, stop spraying the salt solution, fill the test chamber with test specimens and start the test. Sample Requirements We require 3 coated panels x mm. The requirement is the same for all three tests. Make any necessary corrections by adding hydrochloric acid, sodium hydroxide or sodium bicarbonate solution of analytical grade. To determine the corrosivity of the tests, reference?
The cleaning method employed shall depend on the nature of the material, its surface and the contaminants and shall not include the use of any abrasives or solvents which may attack the surface of the specimens.