Corrosion Mechanisms in Steam Systems

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Systems</B></div> <div> Technical report summarizing component damage, corrosion mechanisms, root causes, and solutions.  Provides guidance on prevention, inspection, and analysis for maintenance personnel, metallurgists, corrosion engineers, designers, safety personnel, and systems engineers.</div> <div> <B>Background </B></div> <div> Almost every component of a fossil power plant suffers corrosion to some degree.  Some of these corrosion problems occur infrequently but, when they do occur, can lead to component failures and expensive forced outages. While high visibility, high cost, corrosion-related failures rightly receive a lot of attention, a multitude of other corrosion problems may occur almost continuously at low to moderate rates. These corrosion problems can lead to outages too, but frequently they are simply considered annoying maintenance items. Nevertheless, because of their continuing nature, such problems can also eventually result in significant expense. </div> <div> <B>Objective </B></div> <div> The objective of this Report is to provide a quick and brief reference of all the important aspects of the corrosion mechanisms acting steam cycles.</div> <div> <B>Description </B></div> <div> This ~120 page Report provides concise descriptions of the major corrosion mechanisms acting in the utility and industrial steam cycles and in primary and secondary cycles of PWRs.  It covers the basics of corrosion, water and steam chemistry, general, pitting, galvanic, and crevice corrosion, exfoliation of oxides, stress corrosion, intergranular attack, high cycle and low cycle corrosion fatigue, fretting, flow-accelerated corrosion (erosion-corrosion), cavitation, microbiologically induced corrosion, and hydration.</div> <div> Each of the corrosion mechanisms is defined and the impact on safety, reliability, and cost, important variables, environments acting in steam cycles, important material and corrosion properties, susceptible materials and cycle components, level of understanding, missing data, inspection methods, root causes and engineering solutions, and major references are given.</div> <div> <B>Ordering</B></div> <div> Please contact Jonas, Inc. by calling (302) 478-1375, faxing (302) 478-8173, or emailing jonasinc@steamcycle.com to request a quote. </div> <bR> <DIV ALIGN="LEFT"></DIV> <div> <IMG SRC="1e266430.gif" border=0 width="358" height="67" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> </td> </tr></table></body>