Abstract:
Es werden ein Verfahren und ein System zum Korrosionsschutz und zur Korrosionsschutzüberwachung eines leitfähigen Objekts (O) beschrieben. Das Objekt (O) weist auf einer Objektoberfläche (OF) zumindest eine Schichtanordnung (10) auf, die zumindest eine der Objektoberfläche (OF) zugewandte erste Isolierschicht (11) aus elektrisch isolierendem Material, eine Leiterschicht (13, 13'), welche sich auf der von der Objektoberfläche (OF) abgewandten Seite der ersten Isolierschicht (11) befindet, und eine zweite Isolierschicht (12) aus elektrisch isolierendem Material aufweist, welche sich auf der von der ersten Isolierschicht (11) abgewandten Seite der Leiterschicht (13, 13') befindet. Es wird eine Spannung (U o , U~) zwischen der Objektoberfläche (OF) und der Leiterschicht (13, 13') angelegt und ein Auftreten eines Stroms (l 1 , l 2 , I 3 , I 4 ) zwischen der Objektoberfläche (OF) und der Leiterschicht (13, 13') geprüft. Bei einem Auftreten eines solchen Stroms (l 1 , l 2 , I 3 , I 4 ) wird auf Basis zumindest eines Messsignals, welches einen entlang eines Bereichs der Leiterschicht (13, 13') fließenden Strom (l 1 , l 2 , I 3 , I 4 ) und/oder eine über einen Bereich der Leiterschicht (13, 13') abfallende Spannung repräsentiert, eine räumliche Lage einer Durchbruchstelle (D) der ersten Schutzschicht (11) zwischen der Objektoberfläche (OF) und der Leiterschicht (13, 13') ermittelt. Weiterhin werden eine Objektanordnung (100) umfassend ein vor Korrosion zu schützendes Objekt (O) und ein entsprechendes Korrosionsschutz- und -Überwachungssystem (1) sowie ein hierfür geeignetes Leiterschicht-Beschichtungsmaterial und ein Isolierschicht-Beschichtungsmaterial beschrieben.
Abstract:
본 발명은 지하매설 배관의 피복손상 탐지시스템에 관한 것으로서, 더욱 상세하게는 단말기와 유선으로 연결된 탐지스틱에 진동기, 램프 및 스피커 등으로 구성된 알람발생부가 구비되어 측정된 전위 값에 이상이 발생되었을 때 단말기의 디스플레이화면을 확인하지 않더라도 알람발생부가 작동되어 배관 피복의 손상지점을 정확하게 파악할 수 있도록 한 발명에 관한 것이다. 전술란 본 발명의 특징은, 스틱의 하부 전극(11)을 이용하여 지하매설 배관(1)에 대한 음극 방식의 전위차를 탐지하는 탐지스틱(10); 및 탐지스틱(10)에서 감지된 신호를 증폭하는 증폭부(21), 증폭된 신호의 잡음제거와 입력된 신호를 제한하여 처리하는 신호처리부(22), 처리된 감지신호를 디지털 신호로 변환하는 A/D변환부(23), 디지털 신호로 변환된 정보를 분석하여 배관(1)에 인가되는 전류의 값을 산출하여 분석하고, 배관의 피복손상의 정도를 영상으로 출력해주는 제어부(24), 제어부(24)에서 처리된 정보가 저장되는 메모리부(25), 제어부(24)에서 처리된 정보가 그래픽 영상으로 표시되는 디스플레이부(26), 상기 각부에 전원을 공급하는 전원부(27)를 포함하여 구성된 단말기(20);로 구성되며, 상기 탐지스틱(10)과 단말기(20)는 유선으로 연결되고, 탐지스틱(10)에는 신호를 발생하는 알람발생부(12)가 구비되어 배관(1)의 피복에 손상이 발생된 부위에서는 신호를 발생 하여 사용자에게 전달할 수 있도록 한 것을 특징으로 하는 지하매설 배관의 피복손상 탐지시스템에 의하여 달성될 수 있는 것이다.
Abstract:
Methods and systems are included that relate to the detection and monitoring of defects in wellbore conduits using a distributed sensor system and a wireline transmitter. A method for inspection of wellbore conduits may comprise: running a wireline transmitter into a wellbore; generating an electromagnetic field using the wireline transmitter, wherein the electromagnetic field penetrates one or more conduits disposed in the wellbore, and wherein the electromagnetic field induces emission of at least one secondary electromagnetic field from the one or more conduits; generating at least one signal in response to the secondary electromagnetic field, wherein the at least one signal is generated using a distributed sensor system, and wherein the distributed sensor system comprises electromagnetic field sensors installed in the wellbore and distributed along the one or more conduits; and identifying a pipe electromagnetic or geometric property of the one or more conduits based on the at least one signal.
Abstract:
Die vorliegende Erfindung betrifft eine Vorrichtung zum Charakterisieren eines Kühlmittels (3). Die Vorrichtung umfasst eine korrosionsanfällige Elektrode (10), eine korrosionsbeständige Elektrode (11), eine Spannungsquelle (12), die elektrisch leitend mit der korrosionsanfälligen Elektrode (10) und der korrosionsbeständigen Elektrode (11) verbunden ist und eine Spannung bereitstellt, ein Strommessgerät (13) zum Messen eines durch die korrosionsanfällige Elektrode (10) und die korrosionsbeständige Elektrode (11) fließenden Stroms und eine Auswerteeinheit (14) zum Charakterisieren des Kühlmittels bezogen auf eine Korrosionsschutzwirkung auf Grundlage des durch die korrosionsanfällige Elektrode (10) und die korrosionsbeständige Elektrode (11) fließenden Stroms.
Abstract:
본 발명의 플렉서블 시트형 물성감지 리크센서 장치는 에틸렌 테트라 플루오로 에틸렌(ETFE) 재질의 비도전성 불소계 합성수지로 조성되는 플렉서블한 시트 상태의 베이스시트; 상기 베이스시트의 표면에 서로 만나거나 교차되지 않도록 일정한 패턴 형태로 형성되며 카본블랙이 함유된 에틸렌 테트라 플루오로 에틸렌(ETFE) 재질의 도전성 불소계 합성수지가 증착되어 조성되는 도전라인; 및 상기 도전라인의 바닥에는 순수한 카본블랙으로 이루어진 도전물질;이 포함한다.
Abstract:
A method to assess external corrosion in buried pipelines includes analysis of moisture content of soil along the length of the pipe to choose the most appropriate indirect inspection methods. External corrosion is assessed based on the unification of probability techniques using clustered inspection data and deterministic formulation for soil conditions. A deterministic model pinpoints the location of the most likely areas for corrosion due to the electrochemical cell formation produced by the presence of water and the properties of the soil, such as ion concentrations, pH, soil resistivity, redox potential, corrosion potential and soil type. The filtering of the data by clustering provides reliable results to locate the most corrosive locations. The failure probability is calculated based on in-line inspection data, where different indications could appear and different dimensions are used to link the corrosivity with the failure for choosing repairing methods and taking actions against corrosion.
Abstract:
An oil corrosiveness testing device (1 ) comprises: a box-shaped body (2) containing an electronic board (3) designed to receive and process data; a stem (4) having a first end (5) insertable into an opening of a vessel containing the oil to be tested and a second end (6) connected to the box- shaped body (2); a probe (7) equipped with at least one active element (8) made of copper or silver and electrically connected to the electronic board (3), the probe (7) being connected to the first end (5) of the stem (4) so as to be operatively in contact with the oil; a heater configured to heat the oil in the proximity of the active element (8), the probe (7) being removably connected to the stem (4) to allow the probe (7) to be substituted for another probe.
Abstract:
An impressed current cathodic protection arrangement comprising an elongate metallic structure 2 to be protected and cathodic protection apparatus 3 which comprises a DC power supply 31 and an anode 32. One terminal of the power supply 31 is connected to the structure at a connection point 33 and another terminal of the power supply 31 is connected to the anode. The arrangement includes monitoring apparatus 4 for monitoring effectiveness of cathodic protection provided by the cathodic protection apparatus 3 by determining the electrical potential of the structure relative to surroundings at at least one location which is spaced from the connection point 33.
Abstract:
The present invention is directed to a corrosion resistance evaluator suitable for corrosion testing coated metals substrates, such as auto bodies at an accelerated rate. A corrosion resistance evaluator provided with a chamber containing electrolyte to which anode and cathode coated with protective coating being tested are exposed. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in triangular, truncated triangular or trapezoidal manner for preset durations that are interspaced with recovery periods. The impedance date collected is then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
Abstract:
The present invention is directed to a process for evaluating corrosion resistance of coated metals substrates, such as autobodies at an accelerated rate. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in triangular, truncated triangular or trapezoidal manner for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).