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Aqueous alkaline electrolyte for depositing zinc-containing layers on the surface of metal blanks

A metal blank and electrolyte technology, which is applied in the field of aqueous alkaline electrolyte and metal blank corrosion protection, can solve the problem that the corrosion protection is not constant and high, and achieve the effect of good tolerance

Active Publication Date: 2022-04-29
CARL FREUDENBERG KG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this zinc / iron layer has not been realized so far, moreover, because its corrosion protection is not consistently high and there are always large outliers with many white corrosion products

Method used

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  • Aqueous alkaline electrolyte for depositing zinc-containing layers on the surface of metal blanks
  • Aqueous alkaline electrolyte for depositing zinc-containing layers on the surface of metal blanks
  • Aqueous alkaline electrolyte for depositing zinc-containing layers on the surface of metal blanks

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Embodiment Construction

[0046] Below, the present invention is explained in detail by means of a number of non-limiting examples:

[0047] Two electrolytes of the present invention are prepared as follows:

[0048] 1. Two zinc solutions were prepared as follows:

[0049] 1. Dissolve 35 kg of NaOH in about 50 kg of demineralized water. Then, 4 kg of zinc oxide was dissolved in the hot solution with stirring. Once the zinc oxide is completely dissolved, it is filled to 100 kg with demineralized water. = sodium zincate solution

[0050] 1.5 g / l of iron (as sulfate) with 0.66 g / l of EDTA and 15 g / l of triethanolamine were added as complexing agents to 500 ml / l of demineralized water and 225 ml / l of sodium zincate solution. 2 g / l of potassium permanganate was then dissolved therein and reduced with 4 ml / l of methanol. Demineralized water was added to the resulting solution to obtain about 1 liter of electrolyte.

[0051] 2.40 kg of KOH was dissolved in about 50 kg of demineralized water. Then 3 kg ...

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Abstract

The invention relates to an aqueous alkaline electrolyte for the electrodeposition of layers containing zinc, iron, manganese on the surface of metal blanks, especially blanks made of iron and / or steel A piece, characterized in that the electrolyte contains: zinc ions with a content of 4-60g / l; iron ions with a content of 0.5-30g / l; and manganese ions with a content of 0.1-15g / l.

Description

technical field [0001] The present invention relates to an aqueous alkaline electrolyte and a method for depositing a zinc-containing layer on the surface of a metal blank. In particular, the present invention relates to an aqueous alkaline electrolyte and a method of depositing a zinc-containing layer on a blank, wherein the blank is immersed in the aqueous alkaline electrolyte. The invention also relates to a blank provided with a zinc-containing layer and the zinc-containing layer as corrosion protection for metal blanks, in particular metal blanks made of iron and steel. Background technique [0002] The prior art offers different methods to protect the surfaces of metallic materials from corrosive environmental influences. A widely spread and established method in the prior art is to apply a metallic coating to the metallic workpiece to be protected. Thus, for example, workpieces made of iron and steel are often electroplated in order to protect them from corrosive en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25D5/36C25D5/48
CPCC25D3/565C25D5/36C25D5/48C23F11/00
Inventor P·普莱柯夏A·斯卡尔斯基
Owner CARL FREUDENBERG KG
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