GMW14872 PDF

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Testing Certificate Like other corrosion tests GMW is performed to evaluate accelerated corrosion effects on assemblies and different components. A combination of cyclic conditions provides the right environment for this type of accelerated corrosion. It takes 24 hours to complete one full cycle under these conditions which include three 8-hour stages: an ambient stage which has frequent sprays of solution, humid stage which allows for a higher humidity followed by a dry stage. There are two choices when running the cycle on the weekends.

Option one is to continue with the normal three stages that are run during the week days and option 2 is an ambient stage for the full 48 hours. Excluding weekends calls for a longer test duration as the accelerated corrosion process is not in effect. A big part of running a GMW test is the mass loss data collection.

Mass loss coupons are special steel chips that have been tested thoroughly to measure the corrosivity of the test. Based on the variation of test chosen from the variety of test selections a specific mass loss chart is to be followed. The number of salt sprays can vary for each vehicle area as certain areas are more exposed to environmental corrosion than others. Based on the number of sprays per cycle along with a choice of the five exposures A — E a mass loss value is obtained.

This mass loss value is taken from measuring the weight of the sample prior to exposure from the weight of the samples after it has been exposed and rid of all corrosion until bare metal is present. Many manufacturers want to avoid hiring an accredited professional to conduct their sophisticated testing. By contracting ATC Test Lab you can avoid hiring and training costly specialized employees and equipment to conduct an array of tests.

They are able to quickly detect product failure or unusual corrosion. ATC has new state of the art equipment to perform the most advanced testing. We have over Cubic Feet of testing space available, and the largest testing chambers in the world. By contracting us, you can save money on new costly equipment, maintenance, and down time. You can size and scale your tests based on your level of production. The best way to monitor your products during the testing process is though digital photography.

ATC Test Lab offers high resolution photos at your requested intervals. The use of photographs can help you save money if you need to stop the test early due to product failure or unusual corrosion. Terms and Conditions. Read Update. Get a Quote. GMW Cyclic Corrosion Exposure Testing. Request a Quote. Contact Information. Company Name. Phone Number. The following information will be helpful to generate a quote:.

Part Description. Sample Dimensions Length x Width x Height. Number of Samples. Type of Desired Testing. Spec Rev. Duration of Test If Applicable. Orientation or significant surface. Photos Required? Yes No. Frequency of Photos. Special Instructions. File Upload. Quotes within 24 hours. A2LA Accredited Technicians. Specialized Testing Equipment and Chambers. Receive Photographs and Updates. We have over cubic feet of testing space available. Large testing chambers Our lab has state of the art equipment to perform the most advanced testing.

A2LA accredited technicians conducting your tests. Next Day Testing. Step 1. Complete the Form. Step 2. Overnight Your Samples. Step 3. Testing Starts. Corrosion Testing Solutions.

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GMW 14872:2018

The test standard summaries are for general guidance only. Though believed to be accurate at the time of writing, this may change over time. So this information should not be used as a substitute for referring to a complete test standard, at an appropriate revision level. In this context they can be considered to be equivalent and interchangeable terms. This is an accelerated laboratory corrosion test method that can be used to determine the corrosion resistance of automotive assemblies and components.

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Testing Certificate Like other corrosion tests GMW is performed to evaluate accelerated corrosion effects on assemblies and different components. A combination of cyclic conditions provides the right environment for this type of accelerated corrosion. It takes 24 hours to complete one full cycle under these conditions which include three 8-hour stages: an ambient stage which has frequent sprays of solution, humid stage which allows for a higher humidity followed by a dry stage. There are two choices when running the cycle on the weekends. Option one is to continue with the normal three stages that are run during the week days and option 2 is an ambient stage for the full 48 hours. Excluding weekends calls for a longer test duration as the accelerated corrosion process is not in effect.

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