# US 2018/0024043 A1 · Method for monitoring microbiologically induced corrosion on metal surfaces

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- Number: US 2018/0024043 A1
- Document ID: US20180024043A1
- Status: Published application
- Kind: A1
- Application number: 15/554,043
- Filed: 2016-02-26
- Published: 2018-01-25
- Earliest claimed: 2015-03-06
- Applicants: Dow Global Technologies LLC; Rohm and Haas Company
- Inventors: Selvanathan Arumugam; John W. Ashmore; Tirthankar Ghosh; Heather R. Mcginley
- Web page: https://patentgrep.com/patent/US20180024043A1

## CPC

- G01N 17/006: {of metals}
- C12N 1/00: Microorganisms; Compositions thereof (medicinal preparations containing material from protozoa, bacteria or viruses A61K35/66, from algae A61K36/02, from fungi A61K36/06; preparing medicinal bacterial antigen or antibody compositions, e.g. bacterial vaccines, A61K39/00); Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- C12N: MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA (microbiological testing media C12Q1/00)

## Abstract

A method for monitoring microbiologically induced corrosion on metal surfaces in contact with a fluid. The method comprises adding to the fluid a silanol compound or silanol compound precursor having a group detectible by ultraviolet spectrophotometry or fluorescence spectroscopy, or which is isotopically enriched.

## Claims

### Claim 1

A method for monitoring microbiologically induced corrosion on metal surfaces in contact with a fluid; said method comprising adding to the fluid a silanol compound or silanol compound precursor having a group detectible by ultraviolet spectrophotometry or fluorescence spectroscopy, or which is isotopically enriched.

### Claim 2 (depends on 1)

The method of claim 1 in which said silanol or silanol compound precursor is added to the fluid to produce an initial silanol concentration from 10 ppm to 2 wt %.

### Claim 3 (depends on 2)

The method of claim 2 in which the silanol compound precursor has formula XSi(G)3, wherein G represents C1-C8 alkyl, C1-C8 alkoxy, chloro or a combination thereof provided that there is at least one alkoxy or chloro present; and wherein X represents a uv-active or fluorescent group.

### Claim 4 (depends on 3)

The method of claim 3 in which a silanol compound precursor is added to the fluid.

### Claim 5 (depends on 4)

The method of claim 4 in which the fluid has a water content from 0.01 to 100 wt %.

### Claim 6 (depends on 5)

The method of claim 5 in which the silanol compound precursor has a group detectible by ultraviolet spectrophotometry or fluorescence spectroscopy

### Claim 7 (depends on 6)

The method of claim 6 in which the fluid is crude oil having at least 0.05 wt % water.

### Claim 8 (depends on 7)

The method of claim 7 in which the fluid is natural gas having at least 0.05 wt % water.

### Claim 9

A method for monitoring microbiologically induced corrosion on metal surfaces in contact with a fluid; said method comprising adding to the fluid a silicate compound which is isotopically enriched.

### Claim 10 (depends on 9)

The method of claim 9 further comprising monitoring a level of isotopically enriched silicate compound in the fluid.