The present invention relates to compositions including a water soluble magnesium salt, water soluble calcium salt, and gluconate, which have a beneficial effect on corrosion during cleaning. The present compositions can reduce corrosion of a variety of surfaces including glass, aluminum, chrome, copper,...http://www.google.com.hk/patents/US7741262?utm_source=gb-gplus-share專利 US7741262 - Compositions including hardness ions and gluconate and methods employing them to reduce corrosion and etch
