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Phosphorization liquid of manganese series containing calcium

A phosphating solution and manganese-based technology, applied in the coating process of metal materials, etc., can solve the problems of difficult formation of phosphating film, unstable phosphating film, and inability to realize industrial production, etc., and achieve scientific and reasonable composition and dosage , No need for copper plating, low cost effect

Inactive Publication Date: 2005-10-26
李长吉
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AI Technical Summary

Problems solved by technology

However, the phosphating film formed is unstable, and the phosphating film is not easy to form after the phosphating working solution is aged, and industrial production cannot be realized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The composition and weight ratio range of the manganese-based calcium-containing phosphating solution are:

[0017] Phosphoric acid 20-31%

[0018] Manganese Carbonate 9-16%

[0019] Nitric acid 0.5-4%

[0020] Calcium hydroxide 0.3-3%

[0021] Add water to the rest to 100%.

[0022] The concentration of the above-mentioned phosphoric acid is about 85%, the concentration of nitric acid is about 90%, and the manganese carbonate is a powder containing about 44% of manganese.

[0023] The production steps of the present invention are fully described below by specific examples.

[0024] Based on 100 kg of finished product.

[0025] 1. First add about 40 kg of clear water to the reactor, then add about 25 kg of 85% phosphoric acid, and stir evenly;

[0026] 2. Add about 15 kg of manganese carbonate to the reaction kettle. The manganese carbonate is powdery manganese carbonate containing about 44% manganese. Stir the manganese carbonate evenly and fully dissolve it;

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PUM

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Abstract

The present invention relates to Mn series Ca containing phosphide solution in the domain of final chemical engineering. The main characteristic is its component and the ratio of its weight is: 20 - 31% H3PO4, 9 - 16% MnCO3, 0.5 - 4% HNO3, 0.3 - 3% CaOH and water it until 100%. The phosphating solution can make black, compact and twinkling phosphating film on the surface of metal, and there are also in the phosphating film. It also improved the capability of phosphating film. The experiment proves that: The phosphating film can enhance the wearable and anti-corrosive capability. The phosphating solution is steady and its component is suitable. It's easy to prepare the solution and cost little, and it's also passes over the process of copper-plates. It is the preparation of updates in phosphating solution belongs to manganese catalyst.

Description

technical field [0001] The invention belongs to the field of fine chemicals, in particular to a manganese-based calcium-containing phosphating solution. Background technique [0002] The oil casing coupling is an important connecting part of the well pipe for oil exploitation. One of the domestic and even world requirements for the processing of the oil casing coupling standard is "five ups and five downs", that is, the casing and the coupling are tightened with a large torque. Five times, check whether the thread after five times of tightness is damaged and whether there is a sticking problem. If there is no damage or no sticking phenomenon, it is qualified. At present, manganese-zinc phosphating solution is generally used for surface treatment of oil casing couplings. After this treatment, a certain phosphating film will be formed on the metal surface, but the effect of the phosphating film formation is not good, and the performance Unstable, unable to prevent sticking, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/06
Inventor 李长吉
Owner 李长吉
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