Crevice corrosion of copper alloys is similar in principle to that of stainless steels, but a differential metal ion concentration cell (Figure 33.4 (b)) is set up in place of the differential oxygen concentration cell.The copper in the crevice is corroded, forming Cu + ions. Biological organisms, which, combined with the minor constituents, often control the rate of the corrosion reactions occurring on metals in seawater [2-4].

1.More the reactivity of metal, the more will be the possibility of the metal getting corroded. Presence of electrolytes in water also increases the rate of corrosion. 2 3. Corrosion can happen at any rate, depending on the environment that the metal is in. Factors affecting rate of corrosion: Several factors affecting the rate of the corrosion, which can be divided into two parts 1. However, since atmospheric corrosion is so widespread, it is recommended to take effective precautionary measures when it comes to corrosion prevention. The most important variables were found to be dissolved oxygen concentration, velocity, and temperature.

The following factors significantly affect the magnitude of galvanic corrosion:- ( A ) Position of metals in the Galvanic series : For galvanic corrosion. INTRODUCTION Corrosion is a process of formation of the compound of pure metal by the chemical reaction between metallic surface and its environment. These diffuse out of the crevice, to maintain overall electrical neutrality, and are oxidized to Cu 2+ ions. Factors influencing Corrosion of Reinforcement In reinforced cement concrete construction the corrosion of reinforcement takes place due to the presence of chlorides and sulphates beyond a critical limit and when sufficient alkalies is not obtained within the concrete to maintain steel in a positive condition. corrosion of iron in sea water takes place in. large extent than in distilled water because sea water contains salts i.e.

In addition, the salt concentration of seawater can vary from full strength ocean water to coastal seawater or brackish conditions. Corrosion is a term for the oxidation of metals. The factors that affect corrosion are: 1. Abstract. Factors that affect the rate of corrosion. Nature of the metal: Some metals corrode more easily than others. Temperature and pressure of the medium govern the solubilities of the corrosive species in the fluid, such as oxygen (O ), carbon dioxide (CO ), chlorides, and hydroxides.

Humans have most likely been trying to understand and control corrosion for as long as they have been using metal objects. Depending on the situation and application, you may be able to treat the area that has corroded.