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potential measurements

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Published: 01 December 2015
Fig. 13 Pipe-to-soil potential measurement More
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Published: 01 January 2000
Fig. 9 Schematic of a potential measurement. Source: NACE International More
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Published: 01 January 2017
Fig. 7.10 Effects of potential and strain rate on crack-velocity values measured for yellow brass in deaerated 1 M NaNO 2 solution. Continuous lines show the crack-velocity values predicted by fast-strain-rate experiments. Source: Ref 7.30 More
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Published: 01 January 2000
Fig. 18 Combined potential and current measurement for the cathodic protection of steel More
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Published: 01 July 2000
Fig. 4.1 Schematic representation of measurements of potentials along a path from anode to cathode area on a corroding surface More
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Published: 01 July 2000
Fig. 6.6 Schematic arrangements for measurements of electrode potentials using an electrometer. (a) Circuit completed through a salt bridge between the reference electrode and the specimen electrolyte. (b) Circuit completed through the specimen electrolyte More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... might simulate a humid tropical area, the salty air of a seaside area, a salted road in winter, or one of many others. Other accelerated tests measure a given behavior of the materials by electrochemical means, such as the pitting-breakdown potential in an anodic polarization test, and relate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940233
EISBN: 978-1-62708-302-7
... in an electrolytic solution. It describes how corrosion potentials and current densities are measured and explains how to deal with various sources of error. It also explains how electrochemical impedance measurements are used and describes the underlying theory and procedures in some detail. corrosion rate...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030019
EISBN: 978-1-62708-282-2
... series of metals and alloys is useful for predicting galvanic relationships. Such a series is an arrangement of metals and alloys according to their potentials as measured in a specific electrolyte. The galvanic series allows one to determine which metal or alloy in a galvanic couple is more active...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870025
EISBN: 978-1-62708-299-0
... on electrolytic solution potential of aluminum. Potentials are for high-purity binary alloys solution heat treated and quenched. Measured in a solution of 53 g/L NaCl plus 3 g/L H 2 O 2 maintained at 25 °C (77 °F) Most commercial aluminum alloys contain additions of more than one of the principal alloying...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090241
EISBN: 978-1-62708-266-2
... range is further illustrated in Fig. 8.2 , which gives results of weight loss measurements for alloy 3004-H14 specimens exposed in water and in salt solutions at various pH values. Fig. 8.1 Pourbaix diagram for aluminum with an Al 2 O 3 · 3H 2 O film at 25 °C (75 °F). Potential values...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030338
EISBN: 978-1-62708-282-2
... sandy soils or a mixture of sand and bedrock. There was inadequate CP in these locations, based on pipe-to-soil potential measurements or pH measurements of electrolytes found beneath disbonded coatings ( Ref 17 ). Cathodic Protection Cathodic protection is closely related to the high-pH cracking...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310011
EISBN: 978-1-62708-286-0
...), and as such they are associated with Reaction 1 rather than a physical cell. The potential difference is referred to as the electromotive force (emf) of the cell. It is also referred to as the open circuit potential because it is the potential measured by the voltmeter in Fig. 1(b) when a negligible current flows...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820203
EISBN: 978-1-62708-339-3
... model element, the constant phase angle ( Ref 5 ). Electrochemical Noise (EN) In this technique, fluctuations in potential and current between freely corroding electrodes are measured. Because of the small scale of these fluctuations of interest (in many cases <1 μV and <1 nA), sensitive...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940127
EISBN: 978-1-62708-302-7
.... It then presents a simple model of a galvanically coupled electrode, in which the metal is represented as an array of anode and cathode reaction surfaces. The chapter goes on to develop the related theory of mixed electrodes, showing how it can be used to predict corrosion rates based on measured potentials...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090191
EISBN: 978-1-62708-266-2
... in high-conductivity boiling water reactors (BWRs) ( Ref 6.6 ) and (b) as measured in slow-strain-rate tests at 3.7 × 10 −7 /s on preirradiated type 304 stainless steel in 288 °C (550 ° F) water ( Ref 6.8 ). The effect of corrosion potential via changes in dissolved oxygen is shown at a fluence...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030033
EISBN: 978-1-62708-282-2
... shown in Fig. 3 . This figure is a plot of the potential versus the logarithm of the current density. Potential is measured versus a reference electrode, commonly a saturated calomel electrode (SCE), and a potentiostat is used, along with an auxiliary or counter electrode, to make such measurements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870075
EISBN: 978-1-62708-299-0
... ). The criterion for cathodic protection of aluminum in soils and waters has been published by the National Association of Corrosion Engineers ( Ref 14 ). The suggested practice is to shift the potential at least −0.15 V but not beyond the value of −1.20 V as measured against a saturated copper sulfate (Cu/CuSO 4...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940087
EISBN: 978-1-62708-302-7
... as a function of current density or charge transfer in a given area. The chapter explains how to measure and plot electrode potentials and currents and how to interpret the resulting polarization curves. It also discusses the effects of concentration gradients, explaining how they cause diffusion and, in some...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440085
EISBN: 978-1-62708-262-4
... for applications such as bell furnace annealing. The oxygen probe is an in situ type device; that is, it directly samples the atmosphere being measured. The electrical signal generated by an oxygen probe is directly proportional to the carbon potential of the atmosphere. Infrared control measures a sample...