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US 10,702,896 B2Granted
Method for cleaning a metal surface of a metal component of an industrial plant
AssigneeBasell Polyolefine GmbH
InventorAntonio Ling
Life of this patent
Estimating the term…
Abstract
A method for cleaning a metal surface of a metal component of an industrial plant is disclosed comprising measuring the electrical resistance RA1 of a metal component over a cleaned area of the metal surface with a resistance meter, comparing the electrical resistance RA1 measured with a pre-determined electrical resistance value RDET, assessing whether RA1 is greater, smaller or equal to RDET, and repeating cleaning if the electrical resistance RA1 measured is greater than RDET, or terminating cleaning of the surface area of the metal component if RA1 is smaller than or identical to RDET.
Claims18
A method for cleaning a metal surface of a metal component of an industrial plant, comprising the steps of
- a) cleaning at least one area of a metal surface of a metal component after having been put into operation for an interval,
- b) optionally drying the at least one cleaned area of the metal surface of the metal component
- c) providing a pre-determined electrical resistance value RDET which represents an electrical resistance indicative of a sufficiently cleaned metal surface of the metal component of the industrial plant,
- d) measuring the electrical resistance RA1 of the metal surface of the metal component at at least one point of the at least one cleaned area by at least one resistance meter,
- e) comparing the electrical resistance RA1 measured according to step d) with the pre-determined electrical resistance value RDET, and
- f) repeating steps a), d) and e) if the electrical resistance RA1 is greater than the pre-determined electrical resistance value RDET, or
- g) terminating cleaning of the at least one area of the metal surface of the metal component if the electrical resistance value RA1 is smaller than or identical to the pre-determined electrical resistance value RDET,
- wherein the electrical resistance RA1 of the metal component cleaned according to step a), and optionally step b), is measured in step d) by
- moving a probing tip over at least part of the cleaned area of the metal surface, and
- having placed a counter tip on a metal surface area belonging to the cleaned metal surface of the metal component of the industrial plant after step a), and optionally step b), have been completed and after said metal surface area of the cleaned metal surface area has subsequently been subjected to at least one scraping, brushing, grinding, etching, pickling and/or polishing step, or
- having placed a counter tip on a metal surface area, wherein said metal surface area is not exposed to a process run in the industrial plant and which does not belong to the cleaned metal surface of the metal component of the industrial plant after step a), and optionally step b), have been completed, and wherein said metal surface area is on said metal component of the industrial plant comprising the cleaned area of the metal surface or is on a metal component which is in electrical connection with said metal component of the industrial plant comprising the cleaned area of the metal surface
- wherein said metal surface area which is not exposed to the process run in the industrial plant and which does not belong to the cleaned metal surface of the metal component of the industrial plant after step a), and optionally step b), have been completed, is subjected to at least one scraping, brushing, grinding, etching, pickling and/or polishing step before the counter tip is brought in contact therewith.
9 more elements
A method for cleaning a metal surface of a metal component of an industrial plant, comprising the steps of
- a) cleaning at least one area of a metal surface of a metal component after having been put into operation for an interval,
- c) providing a pre-determined electrical resistance value RDET which represents an electrical resistance indicative of a sufficiently cleaned metal surface of the metal component of the industrial plant,
- d) measuring the electrical resistance RA1 of the metal surface of the metal component at at least one point of the at least one cleaned area by at least one resistance meter,
- e) comparing the electrical resistance RA1 measured according to step d) with the pre- determined electrical resistance value RDET, and
- f) repeating steps a), d) and e) if the electrical resistance RA1 is greater than the pre-determined electrical resistance value RDET, or
- g) terminating cleaning of the at least one area of the metal surface of the metal component if the electrical resistance value RA1 is smaller than or identical to the pre-determined electrical resistance value RDET,
- controlling or adjusting an initial condition for measuring the electrical resistance of cleaned metal surfaces,
- i) measuring, prior to step d), a second test electrical resistance value R02 on a second metal surface area, wherein said second metal surface area is not exposed to a process run in the industrial plant and which does not belong to the cleaned metal surface of the metal component of the industrial plant, and wherein said second metal surface area is either on said metal component of the industrial plant comprising the cleaned area of the metal surface or is on a metal component which is in electrical connection with said metal component of the industrial plant comprising the cleaned area of the metal surface,
- ii) commencing with step d) if the second test electrical resistance value R02 is identical to or below a predetermined threshold resistance value RTHRESHOLD, which is below the pre-determined electrical resistance value RDET, by having the counter tip placed on said second metal surface area, or
- iii) subjecting the second metal surface area to at least one scraping, brushing, grinding, etching, pickling and/or polishing step if the second test electrical resistance value R02 is above the predetermined threshold resistance value RTHRESHOLD and commencing with steps i) and ii).
7 more elements
A method for cleaning a metal surface of a metal component of an industrial plant, comprising the steps of
- a) cleaning at least one area of a metal surface of a metal component after having been put into operation for an interval,
- b) optionally drying the at least one cleaned area of the metal surface of the metal component,
- c) providing a pre-determined electrical resistance value RDET which represents an electrical resistance indicative of a sufficiently cleaned metal surface of the metal component of the industrial plant,
- d) measuring the electrical resistance RA1 of the metal surface of the metal component at at least one point of the at least one cleaned area by at least one resistance meter,
- e) comparing the electrical resistance RA1 measured according to step d) with the pre-determined electrical resistance value RDET, and
- f) repeating steps a), d) and e) if the electrical resistance RA1 is greater than the pre-determined electrical resistance value RDTT, or
- g) terminating cleaning of the at least one area of the metal surface of the metal component if the electrical resistance value RA1 is smaller than or identical to the pre-determined electrical resistance value RDET,
- controlling or adjusting an initial condition for measuring the electrical resistance of cleaned metal surfaces,
- i) measuring, prior to step d), a third test electrical resistance value R03 by
- providing a first metal surface area belonging to the cleaned metal surface of the metal component of the industrial plant after step a), and optionally step b), have been completed and which has subsequently been subjected to at least one scraping, brushing, grinding, etching, pickling and/or polishing step, and
- providing a second metal surface area which second metal surface area is not exposed to a process run in the industrial plant and which does not belong to the cleaned metal surface of the metal component of the industrial plant after step a), and optionally step b), have been completed, and wherein said second metal surface area is on said metal component of the industrial plant comprising the cleaned area of the metal surface or is on a metal component which is in electrical connection with said metal component of the industrial plant comprising the cleaned area of the metal surface, and
- placing a probing tip on said first metal surface area and a counter tip on the second metal surface area, or
- placing a probing tip on said second metal surface area and a counter tip on the first metal surface area, and
- ii) commencing with step d) if the third test electrical resistance value R03 is identical to or below a predetermined threshold resistance value RTHRESHOLD, which is below the pre-determined electrical resistance value RDET, by having the counter tip placed on said second metal surface area, or
- iii) subjecting the first and/or second metal surface area to at least one scraping, brushing, grinding, etching, pickling and/or polishing step if the third test electrical resistance value R03 is above the predetermined threshold resistance value RTHRESHOLD and commencing with steps i) and ii).
12 more elements
Dependencies are inferred from the claim text.