{"version":"1.0","type":"link","title":"Tarnish - Newikis","description":"Tarnish is a layer of corrosion similar to rust. It is caused by oxidisation - when semi - reactive metals such as copper, brass, silver, or aluminum meet chemicals in the air. It will cause the metal to darken or go dull by making a thin film on the metal. It is caused by a chemical reaction,…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/1/1a/Wolfram_evaporated_crystals_and_1cm3_cube.jpg/1200px-Wolfram_evaporated_crystals_and_1cm3_cube.jpg","thumbnail_width":1200,"thumbnail_height":655}