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I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
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Titanium is the ninth most abundant element in the Earth's crust, found in almost all rocks and sediments, as well as in water bodies and living organisms. It is not found in its pure form in nature, but rather as titanium dioxide (TiO2) or in other compound forms. Major sources are found in igneous rocks such as anorthosite and in mineral sands deposits, which include minerals like ilmenite and rutile. Significant titanium ore bodies are mined in Australia, South Africa, Canada, Norway, and Ukraine. These ores are processed to extract titanium metal or titanium dioxide, a very white pigment used in paints, foods, and cosmetics. Despite its abundance, the extraction and processing of titanium are challenging and costly, which affects its availability and applications.
To whiten yellowed resin, begin by gently cleaning the piece with soapy water to remove any surface dirt. After drying, expose the resin to sunlight for a few days as UV rays can help reverse yellowing. If sunlight isn't effective, consider using a hydrogen peroxide solution or a specially formulated resin polish designed to restore the original color. Soak or apply according to the product's instructions, then rinse and dry. Keep in mind, prevention is key; store resin creations away from direct sunlight and heat sources to minimize yellowing.
Bonding polypropylene to metal can be challenging due to its low surface, making it difficult for adhesives to form a bond. To address this issue, two-part epoxy or polyolefin adhesives are recommended for their ability to adhere to hard-to-bond plastics. The use of two-part epoxy resin results in a strong and durable bond, making it suitable for applications that require high strength.
Proper surface preparation, such as cleaning or roughening the surface, can also significantly improve the bond strength. For more demanding applications, there are polyolefin adhesives specifically formulated for difficult-to-stick plastics that offer superior performance. Always refer to the manufacturer's instructions for optimal results.
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