Flux and process for hot dip galvanization

Details Flux and process for hot dip galvanization Flux and process for hot dip galvanization

C - Chemistry, Metallurgy

23

C

C23C 2/30 (2006.01) C23C 2/00 (2006.01) C23C 2/06 (2006.01)

Patent

CA 2628470

A flux for use in a hot dip galvanization process has an acidic component so that the flux has a pH of about 1.5 or less. The flux also includes an alkali metal chloride and a nonionic surfactant containing polyoxyethylenated straight-chain alcohols with a hydrophile-lipophile balance (HLB) of less than 11. Depending on the particular application, the flux also includes other components, such as ferric chloride, an inhibitor containing an amino derivative and bismuth oxide.

L'invention concerne un flux destiné à être utilisé dans un processus de galvanisation par immersion à chaud et comportant un composant acide, de sorte que le flux présente un pH inférieur ou égal à environ 1,5. Le flux comprend également un chlorure métallique alcalin et un surfactant non ionique contenant des alcools polyoxyéthyléniques à chaîne droite avec un bilan hydrophile-lipophile (HLB) inférieur à 11. En fonction de l'application particulière, le flux comprend également d'autres composants, comme du chlorure ferrique, un inhibiteur contenant un dérivé aminé et de l'oxyde de bismuth.

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