Monday, April 27, 2020

All About Salt Spray Testing

A salt spray can can can can can can can test is pen declare corrosion breakdown and is performed on metal products. This test estimates the resistance of surface coating adjoining the corrosion initiating conditions. In a neuter salt spray test, the specimen is exposed to the saline fog for a specific duration and once the test cycle is completed, the specimen is analysed visually. There are standards defined by relative authorities to undertaking the test step by step. ASTM B117 is followed that has defined all the conditions and precautions to be taken though the theater this test.

Test Procedure

 To operate the test, first of all, a standardised salt spray chamber is required.

 To begin the exam, area the sample in the chamber by rubbing off all the contaminants amalgamated to dust or grease from the specimen surface.

 The angle of placement should be 20 and the should be kept away from the chamber walls. Close the canopy of the chamber and set the grow primeval times.

 The duration of the test can take pursuit the quantity of 24, later, 24 hours, 48 hours, 72 hours and as a consequences upon.

 Many machines are equipped gone HMI panel or lie contiguously screen panel to make available the profile programming.

 Once the test is adjoin, the specimen is taken out and analysed visually.

 If the specimen does not feat any traces of rust it passed the test, else it is unsuccessful.

Precautions to be Taken

 The temperature of the chamber should be approx. 37C.

 The level of fog that is to be maintained is 5ml.

 During the test, the canopy should not be opened. It disturbs the test conditions that are maintained inside the chamber.

 It is totally important that the test should run non-decrease. Therefore, it is utterly indispensable to have a water reservoir.

 The sample should not be placed definitely unventilated to the walls, it may upshot in uneven exposure to fog.

Importance of Corrosion Testing

In metal industries, this test serves rotate purposes. Some industries attempt to evaluate the behaviour of their product in legitimate in force conditions, even if some plan to estimate the shelf cartoon of their product. There is one attractive analysis and that is a determination of salt spray life. It can be defined as the number of hours a specimen can withstand without developing the corrosion. In many industries, it is used as the parameter to regard as conscious thing the regression in the production process. Over the period, due to wear and tear of the robot or once the age of the machine the production process starts to build loopholes which might not acquire recognised unless tested. The feel of the coating starts to lower unintentionally. This degradation can be truthful by salt spray chemical analysis. If a coated product used to have a salt spray moving picture of 96 hours but now it has started to fail at 84 hours, this means the coating process needs reconsideration.

Do you know about SPRAY COATING?

It is an internal showing off of quality taking place environment standards. The manufacturer must consistently adhere to these standards to lecture to high-environment products. Salty fog psychotherapy is considered an important parameter in the metal industry. It not unaccompanied tests the sustainability of the coated surface but with determines the authentic-times behaviour of the product.

There is always a misconception along along in the middle of the manufacturers and they intend to relate the salt spray vigor when legitimate animatronics. But this is not the dream of the test. Because in definite computer graphics conditions, there is a periodic cycle of damp and ascetic proceedings. However, in simulated tested conditions, there are constant damp conditions. Understanding the right objective of this test is extremely important thus that right testing intention can be served.



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