ASTM-G96 › Historical Revision Information
Standard Guide for Online Monitoring of Corrosion in Plant Equipment (Electrical and Electrochemical Methods)
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Scope
1.1 This guide outlines the procedure for conducting on-line corrosion monitoring of metals in plant equipment under operating conditions by the use of electrical or electrochemical methods. Within the limitations described, these test methods can be used to determine cumulative metal loss or instantaneous corrosion rate, intermittently or on a continuous basis, without removal of the monitoring probes from the plant.
1.2 The following test methods are included: Test Method A for electrical resistance, and Test Method B for polarization resistance.
1.2.1 Test Method A provides information on cumulative metal loss, and corrosion rate is inferred. This test method responds to the remaining metal thickness except as described in Section 5.
1.2.2 Method B is based on electrochemical measurements for determination of instantaneous corrosion rate but may require calibration with other techniques to obtain true corrosion rates. Its primary value is the rapid detection of changes in the corrosion rate that may be indicative of undesirable changes in the process environment.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 5.6.
Keywords
corrosion monitoring in plant equipment; electrical resistance method of corrosion measurement; on-line corrosion monitoring; polarization resistance method of corrosion measurement
To find similar documents by ASTM Volume:
03.02 (Corrosion of Metals; Wear and Erosion)
To find similar documents by classification:
77.060 (Corrosion of metals Surface treatment and coating, see 25.220)
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Document Number
ASTM-G96-90
Revision Level
1990 EDITION
Status
Superseded
Modification Type
Editorially changed
Publication Date
March 30, 1990
Document Type
Guide
Page Count
9 pages
Committee Number
G01.12