In the manufacturing industry, people have different mind sets. Some want to produce quantity while others focus more on quality. Well, the quantity may get you instant money but with substandard quality, it becomes difficult to survive in the market. On the other hand, the consumer is becoming more quality conscious. Incorporating strong quality check process may cost companies a bit more, but it will surely strengthen the brand reputation and increase the revenue flow. In this post, we will not talk about all industries but the only metal industry. How can quality check process be incorporated? And how it affects the overall production cycle.

 

Testing of Metal Objects

Every time we think of metal, the first thing that strikes is, corrosion. All metal types are prone to rust. Some are less resistant and required appropriate coating. So that metal surface does not come into contact with elements that initiate corrosion. Humidity, water, salts present in air and water, gases in the atmosphere corrode the metal surface if does not provide appropriate protection. Now the question is, if every metal is coated for protection, why corrosion is still there? The quality of the coating is varied. Coatings are of two types, metallic plating and paint. There are different tests that can assess both the types. Let’s start with metallic plating.

Plating is usually done by electroplating, in which a different metal is treated electrically in a chemical to deposit on the intended surface. This plating is put to test using a salt spray chamber. In this chamber, a salt laden fog is produced at a specific temperature. The metal sample is placed in the chamber for a specific duration, as per the industrial requirement and intended use. The salty fog is created by using NaCl solution with water. The fog is created in a very controlled environment.

For testing of paint, cupping tester is often used. In this test, a physical force is applied on the metal until it experienced a depression or dent on the surface. A punch is used to create the dent. After the deformity, the sample is analysed visually to check any chipping off of paint or cracks in the paint. This helps in checking the elasticity of the paint. If it cracks, it exposes the metal surface beneath the environmental conditions and makes it prone to corrosion. Thus, the paint used for coating need to be reconsidered.

For more information about salt spray chamber and cupping tester, contact our experts.