Download Corrosion Exam Questions with 100% Correct Answers | Verified | Updated 2023-2024 and more Exams Advanced Education in PDF only on Docsity! Corrosion Exam Questions with 100% Correct Answers | Verified | Updated 2023-2024 What does the galvanic table contain - Correct Answer-gavlanic series Using the galvanic table, what metals will be the least corrisive together and why? - Correct Answer-Copper and stainless steel aloys because the closer they are in the series the more compatible what does the galvanic table indicate? - Correct Answer-the need or degree of protection to be applied to reduce expected corrosion in a galvanic and salt water environment How can the corrosion of magnesium aloys be diminished? - Correct Answer-by the use of the proper protective finish What does the formation of a tightly adhering oxide film on aluminum surfaces produce under mild corrosive conditions? - Correct Answer-increased conditions What type of corrosion indicator is usually found on steel? - Correct Answer-red rust What type of corrosion indicator is usually found on copper? - Correct Answer-blue, or blue green What type of corrosion is most commonly found on copper? - Correct Answer- interangular corrosion Why are stainless steels more resistant to common rusting? - Correct Answer-due to passive films How does stainless steel interact with almost any other metal if proper techniques of sealing and protective coating are ignored? - Correct Answer-they can cause galvanic corrision What type of insulation is required between titanium and other metals? - Correct Answer-electrical insulation How are nickel and chromium used and what makes them so uniquely useful? - Correct Answer-used as protective platings, they form continuous oxide coatings protecting themselves and underlying metals What are identifying characteristics of corrosion on silver or gold? - Correct Answer- silver is a brown black film, and gold is a darkening on reflective surfaces Where is carbon in the galvanic series? - Correct Answer-composites Why is separation of carbon/graphite metals to other metals so important? - Correct Answer-to prevent dissimilar metal attack on the attached part What are the four basic standard stages of corrosion prevention and control? - Correct Answer-cleaning, protection, inspection, control What type of cleaner is used when cleaning metals in a corrosive environment and how often should they be cleaned? - Correct Answer-with the mildest soap possible and frequently What should pain surfaces be inspected for? - Correct Answer-irregularities, blisters, flakes, chips List the types of procedures used when implementing corrected treatment when corrosion is detected - Correct Answer-thoroughly inspect all corroded areas, evaluate damage, remove paint/corrosion, apply chemical surface treatment, sealing, and apply paint finishes What are the more common types of finishes used on board naval vessels? - Correct Answer-paint, powder coating, and chemical conversion coating How are exposed metals treated? - Correct Answer-they are wiped down regularly with oil What is the most common example of corrosion? - Correct Answer-rust on steal What four conditions must be present for electrochemical corrosion to occur? - Correct Answer-anodic area, cathodic area, metal, electrolites What is the best way to stop the electrochemical corrosion process? - Correct Answer- remover any of the four conditions What are some of the environmental conditions that will cause corrosion? - Correct Answer-temperature, moisture, salt, atmospheres, ozone, sand, dust, climate, animals, bacteria, volcanic ash, microorganisms What is the substance that may contain contaminants such as chlorides, sulfates, and nitrates? - Correct Answer-Man made What is the temp for mold and bacteria to grow on metals? - Correct Answer-104 f
