Crevice corrosion testing

FIG. 28-15 Sch( niatic diagram of the (icctrochcmical cell used for crevice corrosion testing. Not shown are three hold-down screw s, gas inlet tiil)e, and external thermocouple tiil)e. 

Lizlovs, E. A., Polarization Cell for Potentiostatic Crevice Corrosion Testing , J. Electro-chem., Soc., 117, 256C, Atlantic City Meeting (1970)... 

Guide for crevice corrosion testing of iron base and nickel base stainless steels in seawater and other chloride-containing aqueous environments... 

Table 4.14 Critical temperatures in some pitting and crevice corrosion tests...

Fig. 7.47 ASTM crevice corrosion test assembly. Source Ref 67...

Guide for Crevice Corrosion Testing of Iron-Base and Nickel-Base Stainless Alloys in Seawater and Other Chloride-Containing Aqueous Environments, G 78, Annual Book of ASTMStandards, ASTM, 1992, p 463-470... 

Figure 11.91. Section through damaged region of specimen 9 following ASTM G-48 crevice corrosion test the sites of metallographic sections are indicated by arrows [120],...

Fig. 2.9 Electrochemical cell with separated creviced anode and cathode for crevice corrosion testing [20].

For the study of experimental details in crevice corrosion testing the reader may consult works by Ijsseling [7.22] and Oldfield [7.14]. 

Ijsseling FP. Electrochemical methods in crevice corrosion testing. British Corrosion Journal, 15, 1980 1 51-69. 

Testing for shorter periods may be appropriate when the test sample configuration intentionally provides more severe conditions than anticipated in service. Crevice corrosion tests using severe artificial crevice geometries may only require 30-90 days of exposure to establish relative crevice corrosion resistance. 

FIG. 2—Standardized crevice corrosion test specimen assemblies described in ASTM G 48 B (top) [25,44] and ASTM G 78 (bottom) [78,79], commonly referred to as the rubber band assembly and multiple crevice assembly (MCA), respectively. 

TABLE 3— Results of crevice corrosion tests in natural seawater from the LaQue Center for Coirosion Technology, circa 1993 [77]. 

Potentiostep or potentiostaircase technique—Changes in current density are monitored for a sample that is polarized in a series of potential increments or decrements. Typically, the time duration or potential steps in a crevice corrosion tests are not equal. 

Isseling, F. P., Electrochemical Methods in Crevice Corrosion Testing Report Prepared for the European Federation of Corrosion Working Party Physico-Chemical Testing Methods of Corrosion, British Corrosion Journal, Vol. 15, No. 2, 1980, pp. 51-69. 

Kain, R. M., Crevice Corrosion Testing in Natural Seawater Significance and Use of Multiple Crevice Assemblies, Journal ofTestingandEvaluation, Vol. 18, No. 5,1990, pp. 309-318. 

ASTM G 78 Standard Guide for Crevice Corrosion Testing of... 

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