Chinese scientists double artillery gun lifespan with 2,000-year-old chromium tech upgrade
Scientists in northwest China have doubled the service life of high-temperature, high-pressure artillery barrels by refining a chromium plating technique first used by the Chinese military before 200BC. Bronze swords buried with the Terracotta Army of China’s first emperor, Qin Shi Huang, remained sharp and untarnished after more than 2,000 years underground. Microscopic analysis revealed…