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Chemically resistant multilayered coating for a measuring device used in process engineering

A multi-layer coating, chemical-resistant technology, used in measuring devices, detecting fluid flow by measuring differential pressure, displaying liquid level indicators by pressure measurement, etc., can solve problems such as fragile and damaged coatings, and achieve good corrosion resistance protective effect

Inactive Publication Date: 2017-08-18
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these coatings also have serious disadvantages
On the one hand, the corresponding coating is fragile and can be damaged quickly and easily by impacts and scratches

Method used

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  • Chemically resistant multilayered coating for a measuring device used in process engineering
  • Chemically resistant multilayered coating for a measuring device used in process engineering
  • Chemically resistant multilayered coating for a measuring device used in process engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] attached figure 1 A schematic diagram showing the surface of a part of a sensor unit 1 in contact with a medium, which is coated with a multilayer coating 2 according to the invention. For the sake of clarity, the part 3 of the sensor unit which is in contact with the medium is represented as a rectangle. The multilayer coating 2 consists of a first layer 4 and a second layer 5 arranged thereon.

[0037] As already mentioned, the first layer can consist of metals such as gold, platinum, silver or tantalum or so-called hard materials such as SiC, DLC, Al 2 o 3 , SiO 2 or BN composition. Depending on the application, different materials and correspondingly also different coating methods are advantageous, for example electro-phase deposition, physical vapor deposition processes (PVD) or even CVD methods. The basic principles are known from various publications and are therefore not explained in detail here.

[0038] In particular, the CVD method, in which solid parts...

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PUM

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Abstract

Field device (7, 12) used in process and / or automation engineering for monitoring at least one chemical or physical process variable of a medium (16) in a component (17) carrying a medium at least partially and temporarily and comprising at least an electronic unit (14) and a sensor unit (15), wherein at least one portion of at least one component (3) of the sensor unit is in contact with the medium at least temporarily, the at least one portion of the component (3) in contact with the medium is provided with a chemically resistant multilayered coating (2) consisting of at least two layers, wherein a first layer (4) is made of a material consisting of a densely packed atomic arrangement which provides a protection against corrosion by the medium, and a second layer (5) consisting of a chemically resistant plastic material is arranged around the first layer (4) and protects the first layer against outer damage and corrosion.

Description

technical field [0001] The invention relates to a chemically resistant multilayer coating for at least one component of a field device used in process and / or automation engineering for monitoring at least one physical or chemical process variable of a medium. Background technique [0002] The process variable to be monitored can be given, for example, by the filling state of the medium in the container or the flow of the medium through the line, but also by density, viscosity, pH value, pressure, conductivity, capacitance or temperature. Optical sensors, such as turbidity sensors or absorption sensors are also known. Various basic measurement principles and basic structures and / or arrangements are known from various publications. Corresponding field devices are produced and sold by the applicant in a wide variety. [0003] The field device includes at least one sensor unit and an electronics unit. Usually, at least one component of the sensor unit is at least temporarily ...

Claims

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Application Information

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IPC IPC(8): G01L19/06
CPCG01L19/0627G01F1/38G01F15/006G01F23/14G01F23/2967G01L19/0645B32B9/00G01F23/296
Inventor 托马斯·祖尔策彼得·希菲尔德谢尔盖·洛帕京迈克·图津伊戈尔·格特曼迪特尔·丰肯
Owner EHNDRESS KHAUZER GMBKH KO KG
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