Localized Corrosion and Stress-Corrosion Cracking Quiz

1- General corrosion, 2- Localized corrosion, 3- Stress-corrosion cracking, 4- Hydrogen blistering and cracking, 5- Selective corrosion, 6- Erosion corrosion, 7- High temperature corrosion, 8- Biological corrosion

Stress-corrosion cracking is a type of corrosion that occurs under tensile stress in a corrosive environment. It leads to the cracking of the material without much visible corrosion.

High temperature corrosion occurs at elevated temperatures and has two main types: oxidation and sulfidation.

<p>Selective corrosion targets specific areas of a material, while general corrosion causes uniform thinning and loss of metal throughout the material.</p> Signup and view all the answers

<p>Erosion corrosion is a type of corrosion caused by the combined effect of corrosion and mechanical wear. It differs from other forms as it involves both chemical and physical processes.</p> Signup and view all the answers

<ol> <li>Selection of resistant metals, 2. Use of coatings or linings, 3. Changing environmental conditions, 4. Use of inhibitors.</li> </ol> Signup and view all the answers

<p>By adding chromium and nickel (20%)</p> Signup and view all the answers

<p>Erosion corrosion is caused by the removal of protective films due to erosion. It commonly occurs in liquid systems with solids like pump impellers, agitator blades, and pipeline fittings.</p> Signup and view all the answers

<p>Oxidation and Sulfidation</p> Signup and view all the answers

<p>Biological corrosion occurs indirectly due to the metabolic activity of microorganisms, such as anaerobic sulfate-reducing bacteria.</p> Signup and view all the answers

<ol> <li>Addition of an inhibitor, 2. Use of more corrosion-resistant materials, 3. Use of harder materials</li> </ol> Signup and view all the answers

<p>Cracking resulting from the combined effect of stress and chemical action, serious as it occurs without noticeable metal loss.</p> Signup and view all the answers

<p>By adding chromium</p> Signup and view all the answers

<p>Season cracking of brass in environments containing ammonia.</p> Signup and view all the answers

<ol> <li>Elimination of high stress. 2. Changing the environment conditions, such as temperature.</li> </ol> Signup and view all the answers

<p>Removal of a constituent of an alloy by corrosion without apparent volume loss but with significant strength loss.</p> Signup and view all the answers

<p>Dezincification in brass alloys, where zinc is selectively removed leaving only sponge copper.</p> Signup and view all the answers

<p>Microcracking and blistering caused by the diffusion of atomic hydrogen, often seen in steel equipment handling solutions containing H2S.</p> Signup and view all the answers