Manganese phosphating liquor, preparation and use thereof

A manganese-based phosphating solution and phosphoric acid technology, applied in the direction of metal material coating technology, can solve the problems of not being able to meet its requirements, difficult waste water treatment, increasing process process, etc., to reduce energy consumption, high hardness, and reduce sediment. Effect

Inactive Publication Date: 2008-12-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] With the change of market demand, users put forward higher and higher requirements for the anti-sticking performance of oil casing, and the original zinc-manganese phosphating treatment process can no longer meet their requirements.
In order to overcome this problem, the usual method is to carry out other surface treatments on the coupling, such as copper plating or copper-tin alloy plating, etc., but this method increases the process, increases the production cost, and the copper plating process causes serious environmental pollution and difficult wastewater treatment. , has been phased out

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Based on 100 kg of finished product.

[0047] 1. First add 30 kg of water to the reactor, add 2 kg of phosphoric acid with a concentration of 85%, stir evenly, then add 17 kg of manganese dihydrogen phosphate and stir evenly.

[0048] 2. Make zinc oxide into paste with water and stir well. The specific method is to slowly add 5 kg of water to 3 kg of zinc oxide, and add water while stirring.

[0049] 3. Use a container to add 15 kg of water, add 7 kg of 68% nitric acid and 6 kg of 85% phosphoric acid to mix, then slowly add to the paste zinc oxide, stir while adding, until all are dissolved, then add to the reaction kettle Inside.

[0050] 4. Use a container to add 5 kg of water, 5 kg of nitric acid with a concentration of 68%, and then slowly add 2 kg of calcium hydroxide to dissolve it completely and add it to the reaction kettle.

[0051] 5. Add 3 kg of tartaric acid into the reaction kettle to form a zinc-containing calcium-manganese phosphating liquid.

[0052] T...

Embodiment 2

[0055] Based on 100 kg of finished product.

[0056] 1. First add 30 kg of water to the reactor, add 1 kg of phosphoric acid with a concentration of 85%, stir evenly, then add 10 kg of manganese dihydrogen phosphate and stir evenly.

[0057] 2. Make zinc oxide into paste with water and stir well. The specific method is to slowly add 10 kg of water to 5 kg of zinc oxide, and add water while stirring.

[0058] 3. Use a container to add 12 kg of water, add 5 kg of nitric acid with a concentration of 68% and 7 kg of 85% phosphoric acid to mix, then slowly add to the paste zinc oxide, stir while adding, until all are dissolved, then add to the reaction kettle Inside.

[0059] 4. Use a container to add 10 kg of water, 5 kg of nitric acid with a concentration of 68%, and then slowly add 3 kg of calcium hydroxide to dissolve it completely and add it to the reaction kettle.

[0060] 5. Add 2 kg of tartaric acid into the reaction kettle to form a zinc-containing calcium-manganese pho...

Embodiment 3

[0063] Based on 100 kg of finished product.

[0064] 1. First add 33 kg of water to the reactor, add 3 kg of phosphoric acid with a concentration of 85%, stir evenly, then add 20 kg of manganese dihydrogen phosphate and stir evenly.

[0065] 2. Make zinc oxide into paste with water and stir well. The specific method is to slowly add 8 kg of water to 5 kg of zinc oxide, and add water while stirring.

[0066] 3. Use a container to add 8 kg of water, add 3 kg of nitric acid with a concentration of 68% and 3 kg of 85% phosphoric acid to mix, then slowly add to the paste zinc oxide, stir while adding, until it is completely dissolved, then add to the reaction kettle Inside.

[0067] 4. Use a container to add 6 kg of water, 3 kg of nitric acid with a concentration of 68%, and then slowly add 3 kg of calcium hydroxide to dissolve it completely and add it to the reaction kettle.

[0068] 5. Add 5 kg of tartaric acid into the reaction kettle to form a zinc-containing calcium-mangane...

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Abstract

The invention provides a manganese phosphating solution, a preparation method thereof and an application. The compositions in percentage by mass of the manganese phosphating solution are: 5.0 to 15.0 percent of phosphoric acid, 5.0 to 20.0 percent of manganese biphosphate, 1.0 to 18.0 percent of nitric acid, 0.1 to 3.0 percent of calcium hydroxide, 0.2 to 5.0 percent of zinc oxide, 1.0 to 5.0 percent of tartaric acid and the balance being water. Water, phosphoric acid, pasty zinc oxide, nitric acid and phosphoric acid mixture, calcium hydroxide and tartaric acid are added in a reaction kettle in turn, and are stirred continuously so as to prepare the phosphating solution. The manganese phosphating solution is used in surface treatment of oil well pipe coupling. The manganese phosphating solution can be formed into a compact black crystallized phosphating film on metal surface, thereby effectively improving the abrasion resistance, thread gluing-proof property and seizure resistance of metal surface and increasing the performance of oil well pipe coupling to 4 to 10 times; moreover, the manganese phosphating solution, the preparation method thereof and the application ensure simplified operation and convenient maintenance, and can be effectively used in practical industrialized production.

Description

technical field [0001] The invention belongs to metal surface conversion coating treatment technology, and more specifically relates to a phosphating solution for manganese-zinc-calcium ternary phosphating treatment. Background technique [0002] Phosphating is a simple, reliable, low-cost, and easy-to-operate process for greatly improving the corrosion resistance of metal surfaces. A layer of phosphating film with a thickness of several microns can be formed on the surface of steel treated by phosphating, which can improve the corrosion resistance of metals. It can withstand short-term baking at 400-500°C. It is a good base layer for painting and coating anti-rust grease, so it is widely used in the actual production of surface treatment of steel products. [0003] The modern phosphating process is generally: degreasing→water washing→rust removal→surface adjustment→phosphating→water washing→drying. [0004] The so-called phosphating treatment refers to a surface chemical t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/17
Inventor 马刘宝朱靖
Owner BAOSHAN IRON & STEEL CO LTD
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