Red Seal Boilermaker Practice Exam

What is an important factor when working with stainless steel?

1. Using excessive heat during welding

2. Avoiding contamination to prevent corrosion and maintain its properties

3. Ensuring high pressure in the system

4. Running water through the system frequently

The correct answer is: Avoiding contamination to prevent corrosion and maintain its properties

When working with stainless steel, avoiding contamination to prevent corrosion and maintain its properties is crucial. Stainless steel is designed to resist corrosion due to its chromium content, which forms a passive oxide layer on the surface. However, this protective layer can be compromised by contaminants such as rust, oil, grease, or certain chemicals. When the integrity of this layer is compromised, it can lead to localized corrosion issues like pitting or crevice corrosion. Furthermore, maintaining the properties of stainless steel is essential not just for aesthetic reasons but also for functionality, especially in applications where the metal is exposed to harsh environments or high stress. Proper handling, cleaning, and preparation of stainless steel surfaces help ensure that these properties are preserved and that the material performs optimally in its intended application.