{"id":210,"date":"2017-03-18T20:50:04","date_gmt":"2017-03-18T19:50:04","guid":{"rendered":"http:\/\/vw-kern.at\/blog\/?p=210"},"modified":"2020-05-22T17:02:04","modified_gmt":"2020-05-22T15:02:04","slug":"wieso-stinkt-eine-alte-visco-kupplung-eigentlich-so-erbaermlich","status":"publish","type":"post","link":"https:\/\/vw-kern.at\/blog\/en\/2017\/03\/18\/wieso-stinkt-eine-alte-visco-kupplung-eigentlich-so-erbaermlich\/","title":{"rendered":"Why does an old viscous coupling stink so miserably?"},"content":{"rendered":"

Anybody who already opened an old VC knows what I mean \u2013 the offensive smell of the deep black silicone fluid. But why does it stink so badly?<\/p>\n

<\/p>\n

\"\"<\/a><\/p>\n

In the last couple of weeks I have been studying chemical characteristics of various silicon fluids, and so I ran into these:<\/p>\n

\"\"<\/a><\/p>\n

For all Non-Chemists (including myself): The oxygen in the VC starts at high temperatures (>150\u00b0C) a multilevel reaction. At the end of this reaction formaldehyde and formic acid is produced which gets decomposed to hydrogen and carbon dioxide gas.<\/p>\n

The emerging gas inside the VC is the explanation for the sparkling silicone fluid – once the screw plugs are open. And the funny smell derives from formic acid and formaldehyde.<\/p>\n

Conclusion:<\/strong> The oxygen is not only responsible for the thickening of the silicone fluid, it\u2019s also in charge off the increasing inner pressure and the horrible smell.<\/p>\n","protected":false},"excerpt":{"rendered":"

Jeder der schon einmal eine alte Visco-Kupplung ge\u00f6ffnet hat, wei\u00df wovon ich rede \u2013 dem bei\u00dfenden Geruch den man oft stundenlang nicht aus der Nase bekommt. Aber wieso stinkt altes […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7,4],"tags":[],"translation":{"provider":"WPGlobus","version":"2.8.8","language":"en","enabled_languages":["de","en"],"languages":{"de":{"title":true,"content":true,"excerpt":false},"en":{"title":true,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/posts\/210"}],"collection":[{"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/comments?post=210"}],"version-history":[{"count":6,"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/posts\/210\/revisions"}],"predecessor-version":[{"id":547,"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/posts\/210\/revisions\/547"}],"wp:attachment":[{"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/media?parent=210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/categories?post=210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/tags?post=210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}