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Differential scanning calorimeter instrument and anticorrosive treating method thereof

A differential scanning calorimetry, anti-corrosion treatment technology, applied in the direction of material thermal development, liquid chemical plating, metal material coating process, etc. Application range, strong corrosion resistance, good thermal conductivity

Inactive Publication Date: 2005-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the uneven plating and missing plating that may exist during the electroplating process, the service life of the DSC will still be affected
At the same time, due to the serious harm of hexavalent chromium to the human body and the serious pollution to the environment, the environmental protection departments of various countries in the world have imposed strict restrictions on the discharge of chromium mist and chromium-containing wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] The main components of the electroless Ni-P alloy plating solution include 25 g / L nickel sulfate, 25 g / L sodium hypophosphite and 20 g / L sodium acetate trihydrate. By adjusting the pH value of the solution to 5.0, heating the solution at about 90°C, immersing the reference and sample platforms, fixed chassis, pool, and silver cover in the ordinary DSC cell in the solution for 50 minutes, 7.4-8.6 μm Ni is formed on the surface of the metal material. -P alloy plating.

[0023] After the above treatment, the DSC cell was raised from room temperature at 15 °C / min to 550 °C for 4 hours at a pressure of 0.1 MPa and a hydrogen sulfide / nitrogen atmosphere containing 15% hydrogen sulfide, and repeated 5 times. No bright Ni- Corrosion occurs on the P alloy coating.

example 2

[0025] The main components of the electroless Ni-P alloy plating solution include 25 g / L nickel sulfate, 25 g / L sodium hypophosphite and 20 g / L sodium acetate trihydrate. By adjusting the pH value of the solution to 5.0, heating the solution at about 90°C, soaking the reference and sample platforms, fixed chassis, cell cover, cell wall, and silver cover in the HPDSC cell in the solution for 50 minutes, a 7.5 -8.8μm Ni-P alloy coating.

[0026]After the above treatment, the HPDSC cell was raised from room temperature at 15 °C / min to 550 °C for 4 hours at a pressure of 5.5 MPa and a hydrogen sulfide / nitrogen atmosphere containing 15% hydrogen sulfide, and repeated 5 times. No bright Ni- Corrosion occurs on the P alloy coating.

example 3

[0028] The main components in the electroless Ni-P-SiC alloy plating solution include 25 grams / liter of nickel sulfate, 25 grams / liter of sodium hypophosphite, 20 grams / liter of sodium acetate trihydrate and 12 grams / liter of SiC (diameter is 1-3 μm , the density is 3150 g / L, and the microhardness is 2900-3250HV). By adjusting the pH value of the solution to 5.0, heating the solution at about 90°C, soaking the reference and sample platforms, fixed chassis, cell cover, cell wall, and silver cover in the metal DSC cell for 50 minutes, the metal material A 6.4-7.6 μm Ni-P-SiC alloy coating is formed on the surface.

[0029] After the above treatment, the DSC cell was raised from room temperature at 15 °C / min to 550 °C for 4 hours at a pressure of 0.1 MPa and a hydrogen sulfide / nitrogen atmosphere containing 15% hydrogen sulfide, and repeated 5 times. No bright Ni- The P-SiC alloy coating is corroded.

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Abstract

The present invention relates to a differential scanning calorimeter (DSC) and its antiseptic process, it can raise the application range of DSC, in particular, it can make DS be used in the reaction containing corrosion gas and its anti-corrosion treatment method. Said invention is characterized by that the element in the cell of DSC or high-pressure differential scanning calorimeter (HPDSC) is placed in the Ni-P alloy or Ni-P-X alloy plating solution, and on its surface a layer of Ni-P or Ni-P-X amorphous alloy coat whose thickness is within 20 micrometers is formed. Said coat has good heat conductivity, and does not affect the sensitity of the instrument.

Description

1. Technical field [0001] The invention relates to a differential scanning calorimeter (DSC) and an anti-corrosion treatment method thereof, that is, a treatment method capable of improving the application range of the differential scanning calorimeter, especially a treatment method capable of being used in reactions containing corrosive gases. 2. Background technology [0002] Differential scanning calorimetry (DSC) is a kind of thermal analysis method. It detects the change of heat capacity of the sample relative to the inert reference (such as α-alumina) under the condition of program temperature control. It has high detection degree and can be used The amount is small, so it has been widely used to measure the glass transition, melting, crystallization, reaction characteristics, stability, oxidation induction time and polycrystalline, compatibility, purity and other properties of samples. Now, several instrument companies in the world are producing DSC, with nearly ten t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/36G01N25/20
Inventor 张喜文凌凤香孙万付杨春雁
Owner CHINA PETROLEUM & CHEM CORP