By Olen L. Riggs Jr., Carl E. Locke, Norman E. Hamner (auth.)
The ambitions of this publication are to provide technical information regarding anodic professional tection, clarify how fiscal analyses are made to figure out even if it may be used, and describe many of the functions and gear. Lim itations of the approach could be mentioned. Technological alterations that experience ended in better temperatures, pres sures, and velocities raise corrosion charges and markedly impression fabrics choice and layout judgements. non-stop cycle structures impose elevated calls for on approach reliability. New methods require extra subtle gear made from dearer metals that are frequently in brief provide and topic to the vagaries of foreign trade. The impression of continuous inflation impacts judgements relating to capital expenses and upkeep expenditures. a few difficulties attributable to those issues could be solved, or options simplified, via anodic safeguard. Technical and medical info is gifted on functions to commercial apparatus, economics, layout and install, operation and upkeep, electrochemical ideas, laboratory assessments and methods. A old precis, patent record, word list of phrases, and a subject matter index are integrated. it is very important recognize that a lot of the data has been from the unique paintings of others, together with the courses of many friends.
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Additional resources for Anodic Protection: Theory and Practice in the Prevention of Corrosion
66. 67. 68. 69. 70. 71. 72. 73. 74. K. F. S. Patent No. 2,366,796, January 9 1945. K. F. S. Patent No. 2,377,792, June 51945. A. B. S. Patent No. 3,009,865, November 21 1961. B. Watson, Mater. Prot. 3(6), 54 (1964). E. Locke, Tappi 49(1), 61A (1966). A. Mueller, Pulp and Paper Industry Corrosion Problems. Vol. 2. NACE, Houston, TX (1977). 1. Clark, B. O. F. S. Patent No. 3,347,768, October 17 1967. V. Rybshenkov, et al .. Zashch. Met. 7(6), 718 (1971). E. S. Patent No. 3,375,178, March 261963. D.
Good results from this system did not have sufficient impact to induce plant personnel to allocate time to the truck after it was filled or to the anodic protection system. A successful tank-truck application is described in which a stainless steel tank was used for 93% and 99% acid. 40 Another brief mention of anodic protection of railroad tank cars in sulfuric acid service was reported elsewhere. 4 ! No details were given about the system or the results. Protection Provided for Barge A report describes anodic protection of a barge transporting sulfuric acid.
Materials used range from platinum to cast iron and all are discussed in this chapter. Platinum-Clad Cathodes Early installations of anodic protection used platinum clad on brass as a cathode. Although this is very expensive, it is the best from a stability standpoint. An early installation used a cathode and the mounting shown schematically in Figure 3-1. 2- 8 This electrode has a high contact resistance PLATINUM CLAD A B Figure 3-1. ' A. Earlier version; B. improved later version. 52 Chapter 3 2'12 IN.