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In contrast, steel wheels are usually pressed from sheet metal, and then welded together (often leaving unsightly bumps) and must be painted to avoid corrosion and/or hidden with wheel covers/hub caps. Alloy wheels are prone to galvanic corrosion, which can cause the tires to leak air if appropriate preventive measures are not taken. Also ...
The salt spray test (or salt fog test) is a standardized and popular corrosion test method, used to check corrosion resistance of materials and surface coatings.Usually, the materials to be tested are metallic (although stone, ceramics, and polymers may also be tested) and finished with a surface coating which is intended to provide a degree of corrosion protection to the underlying metal.
DeLorean cars had a fiberglass body structure with a steel backbone chassis, along with external brushed stainless-steel body panels. Some cars have been made from aluminum, which may be more corrosion resistant than steel when exposed to water, but not to salt or certain other chemicals. [citation needed]
• A salt spray ‘pollution’ phase. This may be similar to the traditional salt spray test although in some cases direct impingement by the salt solution on the test specimens, or even complete immersion in salt water, is required. However, this ‘pollution’ phase is generally shorter in duration than a traditional salt spray test.
The popularity of magnesium wheels peaked in 1950 -1960. Magnesium wheels from the middle of 20th century are now considered classic and are highly sought by some classic car enthusiasts. However, those magnesium wheels proved to be impractical because they were prone to corrosion and they were mostly used in racing sports.
An example use-case are wheel rims produced by low -pressure casting because of their good strength, corrosion resistance and elongation at break. Alloys with about 10% Si are used for cylinder heads, switch housings, intake manifolds, transformer tanks, wheel suspensions and oil pans. Alloys with 5% Si to 7% Si are used for chassis parts and ...
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