QUITE TOUGH
■ {DKroittium- Aluminium
'-''•% After experiments extending ovir JH- Very long period, a method bf plating alumlniumf'With ohroml«m Hb« been developed, r ; rpJlB invention fltandai'to the credit of. ■'•*' axi" English coh'oer'n/ and it is likely to play a very important part In the future of the motor?oar. Chroralum is a metal of an extremely hard nature, so hard indeed that it will readily cut glass; as a ■diamond. ;•■-..
Aluminium Is a most refraotory metal to deal with m many ways, and:i for a long time it was thought imp6^B|.ble' -to . coat it eleptroly tically with chromium. • : '.> .'■ •■■f^i ,:■' -The method perfected' Is a somewhat Intricate one, as trie aluminium has first to be ' given "-successive; coats ot nickel and'^ copper, the final coat of ohromium beingvtiven afterwards. Treated m this way, aluminium iarenderedabsolutely proof against .oorrosion. ■ T^he ;<3pst of the chromium treatment is stated .-to be quite moderate. , : '■
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https://paperspast.natlib.govt.nz/newspapers/NZTR19280913.2.55.2
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NZ Truth, Issue 1189, 13 September 1928, Page 20
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147QUITE TOUGH NZ Truth, Issue 1189, 13 September 1928, Page 20
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