What is the purpose of salt spray test? What is the purpose?

Date：2022-07-18 14:38:27Views：1337

Salt spray test is a kind of natural environment test that mainly uses the artificial simulation of salt spray natural environment created by salt spray test machinery and equipment to evaluate the corrosion resistance of products or metal materials. The salt spray detection standard is to make specific provisions on the temperature, humidity, concentration of sodium chloride solution, pH value and other salt spray detection conditions. In addition, the technical requirements for the performance of the salt spray tester are put forward. The evaluation methods of salt spray test results include grade evaluation method, weighing evaluation method, corrosion occurrence evaluation method and corrosion data statistical analysis method. The products that need salt spray test are mainly some metal products, and the corrosion resistance of the products is tested. The following is a brief analysis of salt spray test for your reference.

Purpose of salt spray test

To verify whether the metal parts on the product will be corroded when exposed to the atmosphere or other environments. The product can be placed in the use environment for a long enough time, such as a product life cycle. This is time-consuming and laborious, which is rarely used in practice.

Thus, a convenient method is needed to evaluate the corrosion resistance of products.

Salt spray test is an accelerated corrosion resistance evaluation method of artificial atmosphere. It atomizes a certain concentration of salt water, and then sprays it into a closed constant temperature box. The corrosion resistance of the tested sample is reflected by observing the change of the tested sample after being placed in the box for a period of time. It is an accelerated testing method, which takes a short time, does not need a few years, only a few days, or even a few hours.

Although salt spray test is an effective test method. However, due to many factors affecting corrosion, a single salt spray resistance cannot be used as a representative of the resistance to other media, so the salt spray test results cannot be used as a direct guide to the corrosion resistance of the tested material in all environments. At the same time, the performance of the material in the test can not be used as a direct guide to the corrosion resistance in use. Nevertheless, the salt spray test method can still be used as a method to inspect the tested materials.

Products requiring salt spray test include:

1、 Metals and their alloys

2、 Coating and film, including metal coating, organic coating and anodic oxide film

Organic coatings, such as paint, varnish, powder spraying, antirust oil, etc.

Metal coating, such as electroplating, electroless plating, ion plating, spray plating, hot-dip coating, chemical vapor deposition, etc. Commonly used electroplating layers include zinc plating, copper plating, nickel plating, chromium plating, tin plating, brass plating, lead tin alloy plating, etc.

3、 Electronic products

1. Road traffic: electronic and electrical equipment of road vehicles, machinery, equipment and devices of rail transit rolling stock, auto parts, etc.

2. Computers: computers, display screens, mainframe, computer components, medical equipment and other precision instruments.

3. Electronic communication: mobile phones, RF devices, electronic communication components, PCB, PCBA.

4. Electrical appliances: household appliances, lamps, transformers and other household appliances and electrical equipment, instruments and meters, medical devices.

5. Salt spray testing machine is specially used to test the corrosion resistance of products of various materials after surface treatment such as paint, coating, electroplating, anodic treatment, rust prevention, etc. salt spray testing machine is used to fog the test solution of sodium chloride solution on the coated film; It is an important test equipment for the adaptability and reliability of natural environment of various products in material research, national defense industry, light industry, electronics, instrumentation and other industries.

The above is the salt spray test related content compiled by the core detection team. I hope it will be helpful to you. Shenzhen Chuangxin Online Testing Technology Co., Ltd. is a well-known professional testing institution for electronic components in China, with 3 standardized laboratories covering an area of more than 1000 square meters. The scope of testing services covers: electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, function testing, factory incoming material inspection, component X-ray testing, taping and other test items.