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Automotive developed fast-acting two-component polyurethane adhe- sives for bonding aluminum to steel in the trim shop. The company also developed adhesives that bond alu- minum to steel that can withstand the 180°C temperatures in the body shop, managing residual stresses that build up as materials heat and then cool afterwards.
General Motors industry-first resistance spot welding process for aluminum uses a proprietary multi-ring domed electrode.
age the interfaces between materials with differing CTEs, and provide a galvanic corrosion barrier. Recognizing the practical challenges of high-volume automotive manufacturing, Dow
Ensuring compatibility with sec- ondary attachments is also critical. “No OEM is ready to go solely to adhesives, so they combine adhe- sives with rivets and spot welding.
We need to ensure adhesives work well with those,” she said. Combining adhesives with welds (weld bonding) means using fewer welds. It also means improving durability by spreading
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