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Making zinc electroplating bright

2004

I have problem, how to make Zinc Electroplating become Bright. It is usually for Tower steel. I have formulas and chemicals, but confusion about how to make it better like Zn brightness and resistance to corrosion.

My formula is ;

Zinc Cyanide 50 gr/l
Sodium Hydroxide 120 gr/l
Sodium Cyanide 60 gr/l and
Brightener 2 ml/ ?

The problem is... What kinds of Brightener ?

And maybe any formula for making a better process... Please help with your support... And maybe , Zinc Cyanide replaced with another chemical like Zinc Chloride and what kind of brightener for it

Thanks for all Your Regard,

Rohadi Siregar
Machine shop foreman - Banda Aceh, Sumatra, Indonesia

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Mr. Siregar,

The best and most experienced zinc electroplaters in the USA and in the west do not attempt to formulate their own zinc chloride plating baths, and have tremendously reduced their use of zinc cyanide baths. Is there no supplier you can buy a proprietary zinc chloride plating bath from?

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003

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Dear Mr. Siregar,

If you want to have the same property that you have with Cyanide Zinc, maybe you can try the new versions of Alkaline non cyanide Zinc (Zincate). But if you need only bright finish you can choose Acid Zinc, but you will lose evenness of thickness property in rack plating. For better thickness distribution you have to use Alkaline non cyanide Zinc.

Good luck and best regards,

Tony L. Chandra
electroplating chemicals - Jakarta, Indonesia
2004

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2004

Thanks for you, answering my question And I don't have any problem ,when using Zinc chloride + Boric Acid and etc. Because in my country very high license of plating with Cyanide process

Regards,

Mr. Rohadi Siregar
RS Tower Eng - Banda Aceh, Sumatra Island, Indonesia

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What is the cyanide for in zinc plating and could it react with the latex in our carpet backing process.

We have recently renewed the pipe work and the latex is setting and adhering to the pipes where it is not happening on unplated pipe or plastic pipes.

moonraker
- salisbury wilts england
2004

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Ms. Moonraker, this site is for real people to exchange camaraderie and metal finishing tips, so please provide your real full name.

Cyanide is used in some zinc plating processes, but it is not relevant to this problem. The plated pipes have no cyanide on them. Latex does not adhere to plastic (without effort) and the unplated steel pipes are probably oily. It is not clear whether you are happy or unhappy about the latex adhering to the zinc plated pipes

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004