Method for electrolytic galvanizing using electrolytes containing alkane sulphonic acid

   
   

Matt surfaces are obtained when a metal is coated electrolytically with zinc from an electrolyte solution which contains zinc sulfate or an alkanesulfonate of zinc or mixtures thereof, and optionally further metal salts, sulfuric acid or an alkanesulfonic acid or a mixture thereof, and at least one additive selected from nitrogen-containing surface-active compounds, which may be ionic or nonionic, sulfur-containing anionic surface-active compounds, and surface-active compounds based on multifunctional alcohols having at least three hydroxyl groups.

Le superfici opache sono ottenute quando un metallo รจ ricoperto elettroliticamente di zinco da una soluzione dell'elettrolito che contiene il solfato dello zinco o un alkanesulfonate di zinco o mescolanze e facoltativamente avanza i sali del metallo, acido solforico o un acido alkanesulfonic o una mescolanza ed almeno un additivo scelto dai residui tensioattivi contenenti azoto, che possono essere residui tensioattivi anionici ionici o non ionici, contenenti zolfo e residui tensioattivi basati sugli alcool multifunzionali che hanno almeno tre gruppi dell'idrossile.

 
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