What is Salt Spray Test and How to Choose the Best Salt Spray Chamber in India

Reviewed by Anurag Mishra (Sr. Technical Consultant)

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Quality control is an integral part of any manufacturing process, and salt spray testing is one way to ensure that your finished product meets the highest standards. In this article, we’ll explain what salt spray testing is, why it’s important, and how to select the best salt spray chamber in India for your needs.

Introduction to Salt Spray Testing

Salt spray testing is a corrosion test method that simulates the effects of long-term exposure of metal parts and products to a corrosive environment. The test involves exposing the metal specimen to an aero salt mist (a mixture of salt and water) for a period of time, typically 24 to 96 hours.

The purpose of salt spray testing is to determine the resistance of metal materials and coatings to corrosion. The test is commonly used to evaluate the performance of electroplated coatings, such as zinc, cadmium, and chromium. It can also be used to assess the performance of anodized aluminum and painted surfaces.

There are two types of salt spray tests: ASTM B117 and ISO 9227. ASTM B117 is the most commonly used standard in the United States, while ISO 9227 is widely used in Europe and Asia.

To perform a salt spray test, you will need a salt spray chamber. This is an enclosed chamber where the salty mist is generated. The chamber must be equipped with a means of controlling temperature, humidity, and airflow.

When selecting a salt spray chamber, it is important to choose one that meets your specific needs. Factors to consider include the size of the chamber, the type of corrosion testing you plan to do, and your budget.

If you are planning on doing extensive corrosion testing, it may be worth investing in a custom-built chamber.

Benefits of Salt Spray Testing

Salt spray testing is a popular corrosion test method that is used to assess the corrosion resistance of materials and coatings. The test exposes the test specimen to a controlled environment of salt spray (usually 5% NaCl) for a specified period of time. The test is conducted at an elevated temperature, typically between 35-50°C.

The purpose of salt spray testing is to accelerate the corrosion process in order to predict how materials or coatings will perform in real-world applications. The test can be used to compare the relative performance of different materials or coatings, or to determine if a material or coating meets the required standards for a particular application.

There are several benefits of salt spray testing:

1. It is a relatively simple and inexpensive test method.

2. It provides rapid results, allowing for quick decision-making about material or coating selection.

3. It is a repeatable and reliable test method, providing consistent results that can be reproducible in different laboratories.

4. It can be used to screen a large number of materials or coatings in order to identify the most promising candidates for further testing.

5. The results of salt spray testing can be correlated with other corrosion tests, such as electrochemical methods, to provide a more complete picture of material or coating performance in corrosive environments.

How Salt Spray Chambers Work?

Salt spray chambers, also known as salt fog or corrosion chambers, are enclosed test chambers used to evaluate the corrosion resistance of materials and coatings. The chamber environment is created by a fine mist of salty water (sodium chloride) that is sprayed onto the specimens.

During testing, the salty mist adheres to the surfaces of the specimen and begins to corrode it. The rate of corrosion can be monitored and measured, allowing for comparisons to be made between different materials and coatings.

Salt spray testing is an important tool in many industries, including automotive, aerospace, marine, and electronics. It is often used to test materials before they are put into service, in order to ensure that they will perform as expected.

There are a few things to keep in mind when choosing a salt spray chamber:

-The size of the chamber will need to be large enough to accommodate your specimens

-The type of salt spray chamber (open or closed) will need to be appropriate for your testing needs

-Be sure to choose a chamber with good temperature and humidity control

Different Types of Salt Spray Chambers in India

Salt spray chambers are classified according to the type of testing they are used for. The most common types of salt spray chambers in India are:

1. Corrosion Testing Chambers: These chambers are used to test the corrosion resistance of materials like metals and alloys.

2. Weathering Chambers: These chambers are used to test the resistance of materials to weathering elements like sunlight, rain, snow, etc.

3. Accelerated Aging Chambers: These chambers are used to test the long-term durability of materials by simulating accelerated aging conditions.

What to Look for When Choosing a Salt Spray Chamber?

When choosing a salt spray chamber, there are several factors to consider in order to ensure you receive an accurate and reliable test.

  • The first is the size of the chamber, which should be large enough to accommodate the sample being tested.

  • It is also important to consider the type of pump used to generate the salt spray, as well as the method of delivery (e.g., direct or indirect).

  • Additionally, the chamber should be equipped with a temperature and humidity control system to maintain optimal testing conditions.

Best Practices for Salt Spray Testing in India

When it comes to salt spray testing, there are a few best practices that should be followed in order to get accurate and reliable results. Here are some of the best practices for salt spray testing in India:

1. Use high-quality salt: This is one of the most important factors that will affect the accuracy of your salt spray test results. Make sure to use high-quality salt that is free from impurities.

2. Calibrate the salt spray chamber: It is important to calibrate the salt spray chamber before each use. This will ensure that the test results are accurate and consistent.

3. Follow the manufacturers instructions: Be sure to follow the manufacturer's instructions when using the salt spray chamber. This will help you avoid any errors that could lead to inaccurate results.

4. Take frequent readings: Take frequent readings throughout the duration of the test in order to get accurate results.


Salt Spray testing is an important part of product quality control and must be done correctly in order to ensure that the products are reliable. With the right salt spray chamber, you can accurately simulate years of wear-and-tear and make sure that your products will stand up to any environmental conditions they may encounter in their lifetime. Finding the best salt spray chamber for your needs requires careful consideration of features such as size, temperature range, testing protocols, etc. We hope this article has provided helpful information on what salt spray testing is and how to choose a suitable model for your needs.

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