MaTestLab > Test Standards > ASTM A967 Specification for Chemical Passivation Treatments for Stainless Steel Parts
Last updated 19th October 2024
ASTM A967 Specification for Chemical Passivation Treatments for Stainless Steel Parts
ASTM A967 includes a variety of chemical passivation methods for items made of stainless steel. It contains advice and safety measures for descaling, cleaning, and passivating stainless steel components.
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ASTM A967 Introduction
All types of stainless steel components are intended to have their corrosion resistance improved by ASTM A967for chemical passivation treatments. ASTM A967 deals with the problem of iron or foreign particles that may stick/embed in the surface during processing and, if not removed, may result in the development of rust or stain marks. To prevent these problems, the specification advises chemically treating the parts to remove these particles and allow a passive coating to form on the cleansed surface naturally/with the help of chemical augmentation.
ASTM A967 Test Method
ASTM A967 describes the methods, supplies, and specifications for passivating stainless steel parts in a variety of industries, including aerospace, automotive, and medical industries. ASTM A967 verifies passivation’s efficacy, notably in terms of removing free iron and other external materials. Test is conducted as follows:
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ASTM A967 Testing Lab
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Specimen Preparation
The specimen is prepared in accordance with the requirements given and is checked to make sure it is clean and free of contaminants.
Test Setup and Execution
Thoroughly cleaned and rinsed specimens are immersed in the passivating solution for the allotted time and temperature. Remove the samples from the passivating solution when the appropriate immersion time has passed, then give them a thorough rinsing with deionized water.
ASTM A967 Equipment and Sample Preparation
Specimen details
The ASTM A967 test method is applicable to various stainless steel parts.
Specimen dimensions
Depending on the specific application and the desired evaluation of the passivation process, the dimensions may change.
Specimen preparation
Following cleaning, the samples proceed through the passivation process outlined in ASTM A967, which entails submerging the samples in a passivating solution for a predetermined time and temperature. The passivating solution’s composition, temperature, and immersion time all meet the standards’ specifications.
ASTM A967 Results and Interpretation
On the surface of the stainless steel pieces, the passivation process makes formation of a passive film that serves as a protective barrier, preventing additional corrosion and maintaining the material’s integrity. By eradicating free iron and other impurities from the surface, the passivation process improves the corrosion resistance of stainless steel.
Tests Related to ASTM A967
ASTM A967 is similar to procedures used for corrosion resistance evaluation of stainless steel, including ASTM A380 for detection of free iron contamination on the surface of stainless steel parts plastics and ASTM B117 for evaluation of the resistance to corrosion by exposure to a salt spray environment.
Use of ASTM A967 in Various Industries
The standard mainly has benefits in the aerospace, automotive, medical devices, and food processing industries by enhancing passivation of stainless steel for longer durations and better performance.
Materials Commonly Tested with ASTM A967
It tests ferritic and martensitic stainless steels also with austenitic for passivation processes, uniform protection oxide layer, and suitable for medical and food industries.
Common Challenges and Troubleshooting in ASTM A967 Testing
The testing process lacks passivation results because of inconsistent cleaning and other process parameter aspects. Troubleshooting involves optimising the methods of cleaning, chemical solutions, as well as environmental conditions involved.
Safety and Best Practices in ASTM A967 Testing
Testing safety involves managing hazardous chemicals, such as nitric or citric acid, PPE, ventilation, and proper chemical storage and disposal protocols to minimize the hazard of controlled processes.
Importance of ASTM A967
It standardizes the passivation process of stainless steel components to ensure that products are corrosion-free, longer-lasting and reliable in sensitive applications such as those in the medical field or food industry, thus ensuring consistency of product and compliance with the regulatory requirements.
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FAQ's
Where can I get the astm a967 tested?
You can share your astm a967 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 a967 test to various testing techniques.
How much do I need to pay for the astm a967 test?
Please contact us for a detailed quote for your astm a967 testing needs. Cost incurred to carry out different astm a967 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 a967?
The required number of samples or specimens should comply with the procedure given in the astm a967 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 a967 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 a967 test?
The turnaround time for astm a967 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 a967 tested?
You can share your astm a967 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 a967 test to various testing techniques.
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