MaTestLab > Test Standards > ASTM A90 Weight of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
Last updated 26th February 2025
ASTM A90 Weight of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
ASTM A90 is a standard test method that measures the weight of zinc or zinc-alloy coatings on iron and steel articles. This test is useful in determining the quality of the coating and the amount of protection it provides to the underlying metal substrate.
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A90 Introduction
ASTM A90 is an essential test method for determining the weight of the coating on iron and steel articles. The test method is widely used in the industry for quality control and specification purposes. The test method is essential in ensuring that the coated articles meet the required standards and offer adequate protection to the underlying metal substrate.
ASTM A90 is generally applicable to all types of zinc and zinc alloy coatings. The results obtained through this method are especially useful for quality control, reliability checks, performance evaluations, and specification purposes.
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A90 Test Method
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ASTM A90 Test Method
ASTM A90 test method involves weighing the coated article and then subtracting the weight of the uncoated article to obtain the weight of the coating. The test method has two variations: the magnetic method and the weighing method.
ASTM A90 Equipment and Sample Preparation
Specimen details
The specimens used in the ASTM A90 test method are iron and steel articles with zinc or zinc-alloy coatings. The coatings are ensured to be continuous and uniform over the entire surface of the article.
Specimen dimensions
The acceptable specimen size for ASTM A90 depends on the thickness of the zinc or zinc alloy coatings.
Specimen preparation
The specimens are cleaned and prepared as per the test requirements. The uncoated weight of the specimen is obtained before coating it with zinc or zinc alloy.
ASTM A90 Results and Interpretation
The results obtained from the ASTM A90 test method are used to determine the weight of the coating on iron and steel articles. The results are reported in grams per square meter (g/m2) or ounces per square foot (oz/ft2). The results obtained can be used for quality control, material specification, and research purposes.
Tests related to ASTM A90
ASTM A90 is similar to several other standards that evaluate the weight of coatings on metal articles, including ISO 1461 and ASTM B633. ISO 1461 specifies the general requirements for hot-dip galvanized coatings on iron and steel articles, while ASTM B633 provides a standard for electrodeposited coatings of zinc on iron and steel.
Use of ASTM A90 in Various Industries
This standard measures the thickness and uniformity of zinc coating on steel and iron products, widely used in construction, automotive, energy, oil, and gas, marine, agriculture, etc.
Materials Commonly Tested with ASTM A90
It is a crucial testing procedure applied on many types of galvanized steels, including hot-dip, electro-galvanized, zinc-alloy coated, and galvanized iron, thereby ensuring the corrosion protection and durability of products in various industrial applications.
Common Challenges and Troubleshooting in ASTM A90 Testing
This method of testing measures the weight of zinc coating on iron or steel articles by avoiding ways that develop problems, including inconsistent coating, corrosion, and errors on the part of operators. It largely depends on the proper preparation of the surface, choice of samples, and exterior factors.
Gravimetric Method and Data Collection
This standard measures zinc coating weight on iron or steel articles. It specifies the preparation, the first weighing, the stripping, and finally, the final weighing. The difference in weights is therefore the weight of the coating.
Importance of ASTM A90
It is the benchmark standard for measuring the coat weight of zinc on galvanized iron and steel products in the construction, automotive, and manufacturing industries. Performance specifications are met in products that increase product durability and contribute to environmental sustainability.
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FAQ's
Where can I get the astm a90 tested?
You can share your astm a90 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 a90 test to various testing techniques.
How much do I need to pay for the astm a90 test?
Please contact us for a detailed quote for your astm a90 testing needs. Cost incurred to carry out different astm a90 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 a90?
The required number of samples or specimens should comply with the procedure given in the astm a90 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
How much discount can I get on the astm a90 test?
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 a90 test?
The turnaround time for astm a90 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 a90 tested?
You can share your astm a90 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 a90 test to various testing techniques.
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