Coated steel specimens

D 2933 1974 (1986) Test method for corrosion resistance of coated steel specimens (cyclic method)... 

Practice for making and using U-bend stress corrosion test specimens Recommended practice for laboratory immersion corrosion testing of metals Method for vibratory cavitation erosion test Practice for recording data from atmospheric corrosion tests of metallic-coated steel specimens... 

For the current work an accelerated technique was used. The test coatings were immersed in an electrolyte. The arrangement is such that the coated steel specimen becomes part of an electrochemical cell, thus, facilitating the electrochemical measurements. The experimental arrangement is described by Skerry (4). 

ASTM G33, Standard Practice for Recording Data from Atmospheric Corrosion Tests of Metallic-coated Steel Specimens, West Conshohoken, PA, 1988. 

Several specimen were tested for each of the coating types listed in Table 7.3. In this sub-section, however, the term SPECIMEN No. X is also used for COATING TYPE No, X and should be so interpreted according to the context. The material used for the coated steel specimens were unalloyed steel St 37, Crevice and pitting corrosion testst and galvanic corrosion tests with copper as a contact matcrialj were performed on all specimens supplied,... 

ASTM 033 2004 Standard practice for recording data from atmospheric corrosion tests of metallic-coated steel specimens... 

Table 3.22 Corrosion ((ini/year) of Zinc-Coated Steel Specimens in Lx)ng-Teim (8.5, 12, 18 months) Testing in Seawater (flowing and periodic immersion) and also in a Marine Atmosphere in Relation to Alloying Content of the Zinc Coating and Its Heat Treatment (SS0°C, 15 Min)... 

ASTM G 33, Practice for Recording Data from Atmospheric Corrosion Tests of Metallic-Coated Steel Specimens G 50, Practice for Conducting Atmospheric Corrosion Tests on Metals G 84, Practice for Measurement of Time-of-Wetness on Surfaces Exposed to Wetting Conditions as in Atmospheric Corrosion Testing G 92, Practice for Characterization of Atmospheric Test Sites. 

After removal at the specified exposure period, the specimens are evaluated. Visual examination of the specimens upon removal is usually performed, and a photographic record of appearance is valuable. ASTM G 33, Practice for Recording Data from Atmospheric Corrosion Tests of MetaUic-Coated Steel Specimens, can provide guidance for evaluation procedures. Before determination of mass loss, or for most other evaluation techniques, the specimens must be cleaned. Again, cleaning procedures are described in ASTM G 1 and A 380 for most materials of interest. ASTM G 1 also includes a procedure for determining when the corrosion products have been removed. After cleaning, specimens should be placed in a desiccator with fresh dessicant until ready for further evaluation. 

G33 Atmospheric Corrosion Tests of Metallic-Coated Steel Specimens practice for exposure programs. 

The most widely used simulated service test for static atmospheric testing is described in ASTM G 50, Practice for Conducting Atmospheric Corrosion Tests on Metals. It is used to test coated sheet steels for a variety of outdoor applications. Test materials, which are in the form of flat test panels mounted in a test rack (Fig. 16), are subjected to the cyclic effects of the weather, geographical influences, and bacteriological factors that cannot be realistically duplicated in the laboratory. Test durations can last from several months up to many years. Some zinc-coated steel specimens have undergone testing for more than 30 years. 

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