PT85495A - Processo para a passivacao de superficies de ferro de caldeiras de alta pressao - Google Patents

Processo para a passivacao de superficies de ferro de caldeiras de alta pressao

Info

Publication number
PT85495A
PT85495A PT85495A PT8549587A PT85495A PT 85495 A PT85495 A PT 85495A PT 85495 A PT85495 A PT 85495A PT 8549587 A PT8549587 A PT 8549587A PT 85495 A PT85495 A PT 85495A
Authority
PT
Portugal
Prior art keywords
passivation
high pressure
pressure boiler
iron surfaces
boiler iron
Prior art date
Application number
PT85495A
Other languages
English (en)
Other versions
PT85495B (pt
Original Assignee
Nalco Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nalco Chemical Co filed Critical Nalco Chemical Co
Publication of PT85495A publication Critical patent/PT85495A/pt
Publication of PT85495B publication Critical patent/PT85495B/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
    • C23F11/173—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
PT85495A 1986-08-15 1987-08-06 Processo para a passivacao de superficies de ferro de caldeiras de alta pressao PT85495B (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/896,790 US4719082A (en) 1986-08-15 1986-08-15 Vinyl sulfonic acid - methacrylic acid copolymer passivators for high pressure boilers

Publications (2)

Publication Number Publication Date
PT85495A true PT85495A (pt) 1988-08-17
PT85495B PT85495B (pt) 1993-07-30

Family

ID=25406844

Family Applications (1)

Application Number Title Priority Date Filing Date
PT85495A PT85495B (pt) 1986-08-15 1987-08-06 Processo para a passivacao de superficies de ferro de caldeiras de alta pressao

Country Status (9)

Country Link
US (1) US4719082A (pt)
JP (1) JPS6350485A (pt)
AU (1) AU588205B2 (pt)
ES (1) ES2004955A6 (pt)
FR (1) FR2602799A1 (pt)
IT (1) IT1211708B (pt)
NZ (1) NZ221192A (pt)
PT (1) PT85495B (pt)
SE (1) SE8703142L (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236314A (en) * 1989-09-06 1991-04-03 Grace W R & Co Inhibition of deposition in aqueous systems.
FR2723750B1 (fr) * 1994-08-04 1996-10-25 Concorde Chimie France Composition inhibitrice d'entartrage et de corrosion pour proteger les surfaces en contact avec de l'eau et procede de preparation de ladite composition.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879288A (en) * 1970-07-01 1975-04-22 Frederick Herman Siegele Process of inhibiting scale formation on walls of structures containing an aqueous system
US3682224A (en) * 1970-12-17 1972-08-08 Merrill Bleyle Scale prevention agents of methacrylic acid-vinyl sulfonate copolymers for saline water evaporation
GB2054548B (en) * 1979-06-19 1982-12-22 Sanyo Chemical Ind Ltd Scale removal
US4387027A (en) * 1981-10-09 1983-06-07 Betz Laboratories, Inc. Control of iron induced fouling in water systems
US4457847B2 (en) * 1981-11-05 1996-12-31 Nalco Chemical Co Carboxylate polymers for internal scale control agents in boiler systems
AU555892B2 (en) * 1981-11-05 1986-10-16 Nalco Chemical Company Carboxylate polymers for internal scale control agents in boiler systems
EP0122013B1 (en) * 1983-03-07 1988-12-21 Calgon Corporation Polymeric additives for water
CA1234033A (en) * 1983-10-26 1988-03-15 Fu Chen Water treatment polymers and methods of use thereof
US4604211A (en) * 1985-01-29 1986-08-05 Nalco Chemical Company Acrylic acid-sodium vinylsulfonate-vinyl acetate terpolymer and use thereof as a dispersant

Also Published As

Publication number Publication date
SE8703142L (sv) 1988-02-16
SE8703142D0 (sv) 1987-08-13
AU7601187A (en) 1988-02-18
NZ221192A (en) 1989-01-27
AU588205B2 (en) 1989-09-07
IT1211708B (it) 1989-11-03
US4719082A (en) 1988-01-12
PT85495B (pt) 1993-07-30
FR2602799A1 (fr) 1988-02-19
IT8748290A0 (it) 1987-08-10
ES2004955A6 (es) 1989-02-16
JPS6350485A (ja) 1988-03-03

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Legal Events

Date Code Title Description
FG3A Patent granted, date of granting

Effective date: 19930122

MM3A Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 19940731