SU920474A1

SU920474A1 - Pickup for measuring corrosion rate

Info

Publication number: SU920474A1
Application number: SU802951702A
Authority: SU
Inventors: Юрий Германович Рождественский; Фарит Аглиуллович Асфандияров; Фаина Айзиковна Астрова; Камиль Разетдинович Низамов; Леонид Иванович Семенов
Priority date: 1980-07-03
Filing date: 1980-07-03
Publication date: 1982-04-15

Description

(5) ДАТЧИК ДЛЯ ИЗМЕРЕНИЯ СКОРОСТИ КОРРОЗИИ(5) SENSOR FOR MEASURING CORROSION SPEED

t . t.

Изобретение относитс к измерительной технике и может быть использовано при измерении скорости коррозии в средах, загр зненных токопровод щими примес ми.The invention relates to a measurement technique and can be used in measuring the corrosion rate in media contaminated with conductive impurities.

Известен датчик дл измерени скорости коррозии методом пол ризованного сопротивлени , содержащий корпус, устанавливаемый на объекте с коррозионной средой, электроды, закрепленные на корпусе с помрщ)5Ю держателей, и средства электрического изолировани электродов A known sensor for measuring the rate of corrosion by the method of polarized resistance, comprising a housing mounted on an object with a corrosive environment, electrodes mounted on the housing with a holder, and means for electrically insulating electrodes

Недостатком известного датчика вл етс низка точность измерени , обусловленна осаждением на поверхности датчика, контактирующей со средой, мелкодисперсных примесей, что приводит к замыканию электродов образующимс провод щим осадком и искажению результатов измерени .A disadvantage of the known sensor is the low measurement accuracy due to the deposition of fine impurities on the surface of the sensor in contact with the medium, which leads to the closure of the electrodes forming conductive precipitate and distort the measurement results.

Цель изобретени - повышение точности измерени путем исключени The purpose of the invention is to improve the measurement accuracy by eliminating

осаждени на электродах и корпусе токопровод щих примесей.deposition on the electrodes and the housing of conductive impurities.

Указанна цель достигаетс тем, что в корпусе датчика выполнена открыта со стороны креплени электродов полость. Заполн ема при измерении азорбразным или жидким диэлектриком , а держатели выступают за пределы полости. Кроме того держатели установлены с возможностью This goal is achieved by the fact that the cavity is open on the side of the electrode attachment in the sensor housing. It is filled when measured with an asbestos or liquid dielectric, and the holders protrude beyond the cavity. In addition, the holders are installed with the possibility

10 перемещени вдоль своей оси.10 moves along its axis.

На чертеже изображена схема описываемого датчика.The drawing shows a diagram of the described sensor.

Датчик содержит корпус 1 с герметично установленными в нем держа15 тел ми 2, соединенными с электродами 3 с помощью резьбового соединени через прокладки . Держатели, по которым осуществл етс токоподвод к электродам, повсей длине, The sensor includes a housing 1 with hermetic bodies 2 mounted therein, connected to electrodes 3 by means of a threaded connection through gaskets. Holders through which the current lead to the electrodes is made, the total length

Claims

20, in addition to the contact surface, is shielded from the medium and the sensor housing by electrically insulating material. 5 In the sensor housing, it is made open. on the side of the electrode mounting, cavity 6 is filled when measured through a check valve 7 and channel 8 with a gaseous or liquid dielectric. The holders 2 are mounted for movement along their axis and always protrude beyond the limits of cavity 6. The sensor works as follows. The sensor is mounted on the object, for example in the adapter 9 of the pipeline 10, while the cavity 6 is partially immersed in the corrosion medium 11 flowing through the pipeline 11, for example, petroleum. The cavity 6 is filled through the ball valve 7 and the channel 8 with a gaseous or liquid dielectric, for example, nitrogen or transformer oil, which prevents the ingress of corrosion. It eliminates the formation of a conductive sediment on the surfaces connecting the electrodes thereby eliminating the appearance of a conductive bridge closing the electrodes. The sensor makes it possible to measure the corrosion rate with high accuracy, since the presence of a cavity open on the side of the electrode mounting, filled with a gaseous or liquid dielectric, prevents the deposition of fine current-carrying impurities. The sensor allows operative 4 monitoring of the corrosivity of media containing conductive particles in chemical and electrotechnical installations. Claim 1. A sensor for measuring the rate of corrosion by the method of polarization resistivity, comprising a housing mounted on an object with a corrosive environment, electrodes mounted on the housing with the help of holders, and means for electrically insulating the electrodes in order to increase ACCURACY measurement by eliminating the deposition of conductive impurities on the electrodes and the housing, in the sensor housing is made open from the side of the electrode attachment to the cavity filled in when measuring the gaseous or liquid dielectric, and the holders protrude beyond.

2. The sensor according to claim 1, in connection with the fact that the holders are mounted for movement along its axis. Sources of information taken into account in the examination 1. US Patent If, cl. , 1973 (prototype).