By R. Winston Revie
This Fourth variation offers an up to date assessment of the basic facets of corrosion technology and engineering that underpin the instruments and applied sciences used for dealing with corrosion, improving reliability, and fighting mess ups. decide upon beneficial properties of this new version comprise: increased discussions on electrochemical polarization, predicting corrosion utilizing thermodynamics, metal reinforcements in concrete, and purposes of corrosion keep watch over applied sciences in quite a few industries; and an improved emphasis on environmental matters and laws within the context in their effect on corrosion engineering.
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Extra resources for Corrosion and Corrosion Control 4th Edition
13A, Corrosion: Fundamentals, Testing, and Protection, ASM International, Materials Park, OH 2003, pp. 13–16. PROBLEMS In these problems, temperature is 25 °C unless otherwise stated. 1. 303 RT/F at 50 °C. 2. Calculate the exact half-cell potential for the Ag–AgCl electrode in 1 M NaCl. 3. 01 M ZnCl2. 4. 5 atm at 40 °C. 5. 590 V. What is the pH of the solution? 6. 01 M ZnCl2 acidiﬁed to pH = 2. 7. Calculate the theoretical tendency for nickel to corrode (in volts) in deaerated water of pH = 7. 6 × 10−16.
222 V Like the calomel electrode, the potential is more active the higher the KCl concentration. 3 × 10−4 V/°C. Potentials for other concentrations of KCl can be obtained by substituting the corresponding mean ion activity of Cl− into the Nernst equation. A schematic of a silver–silver chloride reference electrode is shown in Fig. 5. 3 Saturated Copper–Copper Sulfate Reference Electrode The saturated copper–copper sulfate reference electrode consists of metallic copper immersed in saturated copper sulfate, as shown in Fig.
1. Hydrogen electrode. 9) is equal to zero at all temperatures. 10) where pH2 is the fugacity of hydrogen in atmospheres and (H+) is the activity of hydrogen ions. All values of electrode potentials, therefore, are with reference to the hydrogen electrode. 763 V. The hydrogen electrode potential is measured by immersing a piece of platinized platinum in a solution saturated with hydrogen gas at 1 atm (Fig. 1), or, more conveniently, by the glass electrode, for which the potential is also reversible to (in equilibrium with) hydrogen ions.