Astm b117 is a salt spray test used to produce relative corrosion resistance information for specimens of metals and coated metals exposed in a standardized corrosive environment. The astm b 11795 testing procedure is the hvac industry standard method of testing the acceptability and longevity of a paint finish. This environment is maintained throughout the duration of the test. Standard edition country temperature in the test space spray sol vent condensate of the fog course of the test test duration specimen arrangement spray pres sure remarks din 40046 blatt 11 replaced by din iec 682. Jun 15, 2018 the salt spray of our company can do the salt spray test as follows. With the help of this practice test, students will learn to mark their answers properly and. Salt spray chamber corrosion test chamber korroxiii testing procedure presto group duration. Liquid penetrant processes are nondestructive testing methods for detecting discontinuities that are. Hotdip galvanized surfaces are not generally tested in salt spray test see iso 1461 or iso 10684. With the help of this practice test, students will learn to mark their answers properly and gain confidence prior to taking the test. This practice is used in many other standards, both in north america and across the world.
Performance test summary astm 1709 standard practice for operating salt spray fog apparatus for lifetime tool and building products 250 airport road winchester, va 22602 purpose the purpose ofthis testing of lifetime tool and building products ultimate pipe flashing in accordance with the following testing standards. A free powerpoint ppt presentation displayed as a flash slide show on id. A military testing standard for equipment specifying a cyclic salt mistfog test consisting of alternating salt mistfog exposures and drying exposures. The samples were subjected to testing in a singleton salt spray cabinet using astm b117 test methods. The salt spray test, like many other tests, is an accelerated test designed to give results in a relatively short period of time. It can happen in any form and cause a range of material alteration from mechanical damage through changes in physical properties to changes in physical appearance.
After the coating on the boards dried, the samples were placed in the salt fog chamber figure 2. A stepbystep discussion of astm b117, procedure for operating a salt spray fog apparatus. The parts were tested using the salt spray methodology without precleaning. It has also been found suitable for testing anodic coatings on aluminum. Salt spray testing is an accepted method for assessing the suitability of stainless steel parts and fabrications that are likely to encounter chloride environments in service for any particular part, tested under laboratory conditions, a difference in performance between say, 430 1. Conditions for spray testing type of test standard designation concentration by mass of sodium chloride.
Astm b117 practice for operating salt spray fog apparatus. Jan 14, 2016 salt spray testing is an accelerated corrosion test that produces a corrosive attack to coated samples in order to evaluate the suitability of the coating for use as a protective finish. The test was conducted in accordance with astm b11711 standard practice for operating salt spray fog apparatus. Referenced documents purchase separately the documents listed below are referenced within the subject standard but are not provided as part of the standard astm standards.
Nss is the base of salt spray test, it was developed at around 1930s, it is a neutral test which means the test solution ph value is at 6. The salt spray methods are all suitable for checking that the comparative quality of a metallic material, with or. Samples under test are inserted into a temperaturecontrolled chamber where a saltcontaining solution is sprayed, at 35c, as a very fine fog mist over the samples. This document specifies the apparatus, the reagents and the procedure to be used in conducting the neutral salt spray nss, acetic acid salt spray aass and copperaccelerated acetic acid salt spray cass tests for assessment of the corrosion resistance of metallic materials, with or without permanent or temporary corrosion protection. Ppt salt spray testing powerpoint presentation free to. Validation of salt spray corrosion test springerlink. This is designed to provide a controlled corrosive environment for metal or coated metal samples. Both industries are represented by trade associations which promote the use of their respective products. May 15, 2018 a copper accelerated salt spray test cass test is a test used to determine the resistance to corrosion of aluminum alloys. Astm b117 testing, also known as a standard practice for operating salt spray fog apparatus, is used to analyze relative corrosion for specimens of metals and coated metals exposed to various simulated climatic conditions in a controlled environment. It is commonly used to evaluate the performance of metal finishing products and practices. One can see that the first three methods of accelerated testing address the. Modification of astm b117 salt spray corrosion test and its correlation to field measurements of silver corrosion article pdf available in corrosion houston tx 683.
Apr 23, 2003 quality control of corrosion test results implies the validation of the corrosion test method and estimation of the uncertainty of corrosion rate measurement. This environmental exposure testing procedure is designed to accelerate environmental exposure and its effects on metal parts with various alloys, surface treatments including passivation and electropolishing for stainless steel alloys under controlled conditions. Although we are unable to give an actual life expectancy relative to the accelerated salt spray testing, we do feel it gives you a good relative test when compared to other competitive products. The lesser incline will produce a situation where beads of condensate will run off the specimen at a faster rate than a specimen at say 30 degrees,where the bead has a chance to sit. What is the standard practice for operating salt spray fog apparatus. The spray coating application cycle was repeated one, two or three times on different samples in order to achieve different thickness levels.
Demonstrating adequate resistance to salt spray and fog is important, not just for the sake of regulatory compliance but also to deliver an overall higher quality of product to your end users or other. Astm b 117 practice for operating salt spray fog testing apparatus tests durations may be up to 260 hours. The sample weight is measured using a precision weighing balance, ohaus discovery with a precision of 0. Astmb117 salt spray test lifetimetool building products. Usually, the materials to be tested are metallic although stone, ceramics, and polymers may also be tested and finished with a surface coating which is intended to provide a degree of corrosion protection to the underlying metal. The purpose of a salt mist test is to demonstrate that equipment can withstand the influence of a saltladen atmosphere. Astm b117 testing quality control micom laboratories. Instantly download astm b11718 standard practice for operating salt spray fog apparatus. Astm salt spray has a saturated atmosphere 100% rh, and the samples under test are subjected to continual spray. Astm b117 64 standard method of salt spray fog testing. Prohesion compared to salt spray and outdoors qlab. Salt spray testing environmental test chamber vibration. The type and number of test specimens to be used, as well as the criteria for the evaluation of the test results, will be required in the specifications covering the product being exposed or shall be mutually agreed upon by the parties.
The nature of the salt spray test is to subject the specimen to salt fog as a condensate. Observations were made at the following exposure steps. Salt spray testing provides a controlled environment which is utilized to test relative corrosion resistance of rust preventative films, inorganic coatings, and organic coatings such as paints and primers. A salt spray test is a corrosion testing method that uses highsaline environments to measure the corrosion resistance of products, paints and coatings over extended periods sometimes referred to as salt fog, a salt spray test is conducted in a closed chamber that can be adjusted to create a variety of corrosive environments. Astm b11718 standard practice for operating salt spray. Enviropeel hot salt fog test 4,500 hours report in. The corrosion test in an artificial atmosphere of the salt spray mist needs evaluation of corrosivity of the test cabinet by reference specimens. E691 practice for conducting an interlaboratory study to determine the precision of a test method. D609 practice for preparation of coldrolled steel panels for testing paint, varnish, conversion coatings, and related coating. A copper accelerated salt spray test cass test is a test used to determine the resistance to corrosion of aluminum alloys.
A free powerpoint ppt presentation displayed as a flash slide show on. Astm b117 salt spray fog test offered at micom laboratories. In the salt spray test, samples are placed in an enclosed salt spray testing cabinet or chamber built to astm b117 specifications and subjected to uninterrupted indirect fog or spray of a salt water solution. Start your free trial and access books, documents and more. If laser diffraction methodology is used for testing the particle size distribution, it is crucial that test procedure instrumental parameters e. Aass is the method in nss solution with addition of glacial acetic acid in the ph range of 3. For the test, panels are placed in a 5% salt spray and fog atmosphere for measured periods of time. Nasal spray and inhalation solution, suspension, and spray. Such calibration of corrosion environment raises very strict requirements for the method. Testing sprayed concrete flexural tensile strength of fibre concrete on sprayed test specimen.
Annex a1, acetic acid salt spray test, continuous aass annex a2, cyclic acidified salt spray test. B368 test method for copperaccelerated acetic acidsalt spray fog testing. Sep 30, 2011 salt spray chamber corrosion test chamber korroxiii testing procedure presto group duration. What is a copper accelerated salt spray test cass test. Saltfog and salt spray testing any product, materials or system component that is exposed to the elements must be able to withstand corrosion.
Hands on demonstration using over 10 corrosion chambers on. Information sheet salt spray testing why it should not. Quality control of corrosion test results implies the validation of the corrosion test method and estimation of the uncertainty of corrosion rate measurement. This is done inside a temperaturecontrolled chamber.
It is important to note that the standard does not prescribe the interpretation of the results. Salt spray testing is an accelerated corrosion test that produces a corrosive attack to coated samples in order to evaluate the suitability of the coating for use as a protective finish. Standard practice for operating salt spray fog apparatus. In 1939, the neutral salt spray test was incorporated as astm b117. Corrosion tests in artificial atmospheres salt spay test. B368 test method for copperaccelerated acetic acidsalt spray fog testing cass test. Salt fog spray testing services national technical systems. These by products are not produced when a hotdip galvanized specimen is exposed to a salt spray fog. During the salt spray test, the relative weight gain is less than 1%. The panels are tested in the salt spray test for 336 hours.
Figure 1 qfog chamber for the corrosion resistance testing, astm b117 3. Suitable apparatus which may be used is described in appendix x1. The salt spray or salt fog test is a standardized and popular corrosion test method, used to check corrosion resistance of materials and surface coatings. Astm b11719 covers the apparatus, procedure, and guidelines to create and sustain the salt spray fog test environment. The salt spray test procedure basically, the salt spray test procedure involves the spraying of a salt solution onto the samples being tested. E70 test method for ph of aqueous solutions with the glass electrode. Salt spray testing salt spray test is a method that is used to examine the deterioration level of resistance of covered examples. Test samples three steel flange samples overcoated with oxifree tm198 coating system were prepared by oxifree co. A salt mist test gives you one or more of the following advantages. Accelerated tests can often introduce new modes of corrosion and failure that you might not see in the real world.
Corrosion testing services including salt spray test corrosion is a form of material degradation that happens when material interacts with its environment. Assured testing services is capable of providing modified salt spray fog testing per astm g85 for all five 5 of the modified salt spray annexes listed below. To understand why the salt spray test fails to reliably predict real corrosion performance, it is important to look at the test procedure. Typically, the solution is a 5%salt sodium chloride solution. During the course of 80 years of use, there have been many modifications and refinements to. As the weight values are precise, the relative weight gain is effectively due to the salt spray test but it is very low. The copperaccelerated acetic acid salt spray test is the test method in which a 5 % sodium chloride solution with the addition of copper chloride and glacial acetic acid in the ph range from 3,1 to 3,3 is atomized under a controlled environment. Hotdip galvanizing produces zinc carbonates when exposed to the environment, thus protecting the coating metal and reduce the corrosion rate. Pdf laboratory salt spray testing has been used for many years to. Salt spray test is a method that is used to examine the deterioration level of resistance of covered examples.
Im trying to understand the relation between the appearance of a failed salt spray test result and a problem related to the process contamination of seal solution, no good concentration of chromic acid solution. The system was then used to modify the protocol of astm b117. Effects of salt spray test on leadfree solder alloy. D1654 test method for evaluation of painted or coated specimens subjected to corrosive environments. Conditions a procedure is given for evaluating the corrosive conditions within a salt spray cabinet1. Approval according to eu directives or international standards confidence in your product with. Salt spray test methods salt spray testing is covered by the standards such as. Five steel plates have been placed in a salt spray cabinet during 4,000 hours. Due to the wide range of metals and applications, no specific conversion factors can be applied to the salt spray exposure time versus actual natural environmental exposure. Standard practice for operating salt spray fog apparatus1.
Pdf modification of astm b117 salt spray corrosion test. The alternative is to place parts in the field and wait five years to see if they hold up. Salt spray fog condensate collection issues, astm b117. Astm c633 standard test method for adhesion or cohesion strength of thermal spray coatings is the baseline and mandatory process to follow for tensile. They were removed at regular intervals, rinsed and cleaned with a soft brush. With this cyclic test, samples have an opportunity to absorb, via an osmotic effect, more water than in a continuous spray test. Salt spray was first used for corrosion testing around 1914. The devices in which these assessments are conducted are known as salt spray rooms. The standard covers the apparatus, procedure and conditions required to create and maintain the salt spray environment.
Oct 01, 2008 the salt spray test, like many other tests, is an accelerated test designed to give results in a relatively short period of time. Furthermore astm b117 document states the procedure involves the exposure of steel test panels and the determination of their mass losses in a specified period of time. During the course of 80 years of use, there have been many modifications and refinements to b117. Micom offers astm b117 accelerated corrosion testing as part of its surface finish and accelerated aging testing services. The salt spray of our company can do the salt spray test as follows. However in the prohesion test there is a cyclic approach with wetting and drying of test pieces. Accepted practice to test bond strength of thermal spray coatings.