MaTestLab > Test Standards > ASTM D823 Standard Practices for Producing Films of Uniform Thickness of Paint, Coatings, and Related Products on Test Panels
Last updated 1st May 2024
ASTM D823 Standard Practices for Producing Films of Uniform Thickness of Paint, Coatings, and Related Products on Test Panels
The ASTM D823 standard outlines five procedures, such as automated spray machine application and hand-held blade film application, for creating films on test panels with a consistent thickness. It is recommended that users take safety precautions into account. Furthermore, consistent coating thickness may be produced by using wire-wound drawdown bars. Essential elements such as coating material type, amount of thinner, wet and dry film thickness, spray gun specifications, air pressure, and more are emphasized in the standard. For coating atomization, it is essential to use dry, clean compressed air. During testing, precise measurements and controls on film thickness must be made according to predetermined protocols.
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Introduction to ASTM D823
The procedures for attaining a consistent coating thickness on test panels are described in the ASTM D823 standard. Techniques include applying coatings with automated spray equipment or handheld instruments while regulating variables including substance viscosity, traverse speed, and fluid supply rate. These procedures are essential for assessing coatings meant for field or industrial applications, particularly when it comes to the visual characteristics of metallic coatings, such as color and shine. MaTestLab is one of the best testing service providers, with the best network of testing laboratories in the USA to carry out ASTM D823 tests for our clients. The scope of ASTM D823 covers five distinct film preparation procedures that guarantee accurate and consistent results when measuring coating thickness on test panels.
ASTM D823 Test Methods
The test proceeds as follows:
Apparatus Setup
It entails putting the spray gun on the sprayer that is automated. The spray gun’s air input is connected to the air pressure gage, which is connected to the air line hose from the regulator. The distance between the gun tip and the test panel surface is 200–300 mm. To get the required air pressure, which is normally between 40 and 75 psi, the air regulator is adjusted. The traverse speed of the gun mount is controlled by the automated spray machine controls.
Measurement of Thickness
A wet film thickness gauge is used to measure the wet film thickness. After that, the dry film thickness is determined using magnetic or eddy current gages.
ASTM D823 Test Specimens
Specimen Details
Clean, flat, stiff substrates in a range of sizes that may fit in the automated spray machine’s panel holder serve as specimens for coating testing.
Specimen Preparation
The specimens are cleaned properly and handled very carefully to avoid recontamination. To prevent surface damage, specimens with metallic or organic coatings are not excessively clean. The procedures for specimen preparation are conversion coating, vapor degreasing, solvent brushing, solvent wiping, and alkaline cleaning.
Specimen Dimensions
ASTM D823 states that the test panels should be of a size that can be accommodated by the automated spray machine’s panel holder.
ASTM D823 Test Results
ASTM D823 findings provide information related to the type of coating material, number of spray passes, air pressure, temperature of the coating material, thinner added, distance of test panel from gun tip, wet film thickness, type of spray gun, traverse speed, air temperature, relative humidity, temperature of the test panel at the time of application, and the thickness values. These parameters help in troubleshooting, research, & development, ensuring regulatory compliance.
Tests Related to ASTM D823
ASTM D7091 is a test similar to ASTM D823. It is based on some nondestructive methods and offers guidelines for measuring the dry film thickness of coatings and evaluating their performance.
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FAQ's
Where can I get the astm d823 tested?
You can share your astm d823 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d823 test to various testing techniques.
How much do I need to pay for the astm d823 test?
Please contact us for a detailed quote for your astm d823 testing needs. Cost incurred to carry out different astm d823 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm d823?
The required number of samples or specimens should comply with the procedure given in the astm d823 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm d823 test?
The turnaround time for astm d823 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm d823 tested?
You can share your astm d823 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d823 test to various testing techniques.
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