By Roger Francis
This booklet bargains with the several kinds of corrosion for copper and its alloys. It presents formerly unpublished or hard-to-find info, offering a different reference element for information at the corrosion of copper alloys. The book's chapters hide issues corresponding to copper alloys (composition and properties), movie formation and homes, basic corrosion, quite a few sorts of localized corrosion, comparable to pitting, erosion corrosion, dealloying, and corrosion fatigue, galvanic corrosion, particular environments, together with underground corrosion, atmospheric corrosion, and corrosion in waters, and becoming a member of (corrosion of soldered, brazed, and welded joints). This publication is choked with greater than a hundred photographs, in addition to a number of tables and graphs. it's going to attract engineers who desire or are looking to use copper alloys and want information at the strength corrosion difficulties and, in particular, the right way to keep away from them.
desk of Contents
2. Copper and its Alloys
three. movie Formation and houses
four. normal Corrosion
five. Pitting Corrosion
6. Crevice Corrosion
7. Erosion Corrosion and Erosion
10. rigidity Corrosion Cracking
eleven. Corrosion Fatigue
12. Hydrogen Embrittlement
thirteen. Fouling and Microbially motivated Corrosion
14. Galvanic Corrosion
15. Underground Corrosion
sixteen. Atmospheric Corrosion
17. Corrosion in Waters
18. becoming a member of and the Corrosion of Joints
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Additional info for Corrosion of Copper and its Alloys - A Practical Guide for Engineers
This explains the superior performance of copper-nickel alloys, which do not normally require ferrous sulfate dosing to ensure good corrosion resistance. Much of Effertz and Fichte’s work was carried out with river water, but they found no difference in FeOOH colloid formation in fresh water and seawater. 7 Chlorine Chlorine is added to seawater cooling systems to control macrofouling such as by weeds and shellfish. It also has the effect of keeping microfouling (slime) at acceptable levels. Chlorine is usually generated electrolytically in a bypass line and is then injected into the seawater intake, although in some land-based plants, tanks of sodium hypochlorite (NaOCl) may be used instead.
5. In fresh waters, the lower chloride content, typically <200 mg/L, means that the corrosion rate of copper and its alloys is even lower than for seawater. Corrosion rates of 1 to 10 p d y are typical of copper in fresh water at temperatures from 10 to 60°C after a year or more. - 40 THE CORROSION OF COPPER AND ITS ALLOYS Vik et al. 0; total alkalinity 3 to 30 mg/L (as CaC03); calcium 1 to 5 mg/L. This is clearly an aggressive water, in which the formation of a protective film on copper tubes will be difficult.
Hence, the iron-rich films on aluminum brass will not be very thick and protective in cold water, increasing the susceptibility to erosion corrosion. This explains the superior performance of copper-nickel alloys, which do not normally require ferrous sulfate dosing to ensure good corrosion resistance. Much of Effertz and Fichte’s work was carried out with river water, but they found no difference in FeOOH colloid formation in fresh water and seawater. 7 Chlorine Chlorine is added to seawater cooling systems to control macrofouling such as by weeds and shellfish.