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NACE - TM0190

Impressed Current Laboratory Testing of Aluminum and Zinc Alloy Anodes

inactive
Organization: NACE
Publication Date: 5 October 2012
Status: inactive
Page Count: 16
scope:

General

This standard test method describes a laboratory procedure for determining the potential and current capacity characteristics of aluminum and zinc alloy anodes used for CP. It provides a means for screening various heats or lots of anodes to determine performance consistency on a regular basis from lot to lot. Items such as sampling frequency and performance criteria (i.e., test values and intermediate times) are left to the discretion of the user of the test method.

One test method for anode potential evaluation and two test methods for anode current capacity evaluations are described.

The actual values obtained in these tests should not be used for design purposes because they represent laboratory testing.

This procedure can be validated by using zinc anode samples as a reference in the test to verify results of aluminum anodes tested. Zinc samples shall be as defined in ASTM B418 or Military Specification MIL-A-18001 for zinc anodes.

This procedure was evaluated by testing alloys of Al-Zn-Sn, Al-Zn-Hg, Al-Zn-In-Mg, and MIL-A-18001 zinc of the respective nominal alloy composition ranges shown in Table 1. The results of the test are reported in Paper No. 346 presented at CORROSION/84.

The precision of the test has not been validated. The scatter in the test results is considered to result from heterogeneities in aluminum alloy anode materials in general, as tested, rather than the test method itself. Only anode materials exhibiting good, reproducible performance (in accordance with this test method) and meeting manufacturer or user specifications are acceptable.

Document History

October 5, 2012
Impressed Current Laboratory Testing of Aluminum and Zinc Alloy Anodes
General This standard test method describes a laboratory procedure for determining the potential and current capacity characteristics of aluminum and zinc alloy anodes used for CP. It provides a...
TM0190
October 5, 2012
Impressed Current Laboratory Testing of Aluminum and Zinc Alloy Anodes
General This standard test method describes a laboratory procedure for determining the potential and current capacity characteristics of aluminum and zinc alloy anodes used for CP. It provides a...
June 26, 1998
Impressed Current Laboratory Testing of Aluminum Alloy Anodes
A description is not available for this item.
June 26, 1998
Impressed Current Laboratory Testing of Aluminum Alloy Anodes
General This standard test method describes a laboratory procedure for determining the potential and current capacity characteristics of aluminum alloy anodes used for CP. It provides a means for...
January 1, 1990
Impressed Current Test Method for Laboratory Testing of Aluminum Anodes
A description is not available for this item.

References

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