Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Effective Inorganic Salt Corrosion Inhibitors for Titanium Components Exposed to Dilute Hydrofluoric Acid Well Stimulation Fluids

Picture for Effective Inorganic Salt Corrosion Inhibitors for Titanium Components Exposed to Dilute Hydrofluoric
Available for download

This laboratory corrosion test screening program is specifically aimed at identifying practical, common inorganic salts which, when added to warm dilute HF solutions, provides effective corrosion inhibition for UNS R56404(ASTM Grade 29 Titanium).

Product Number: 51317--8978-SG
ISBN: 8978 2017 CP
Author: Ronald Schutz
Publication Date: 2017
Industry: Chemical Inhibitors
$0.00
$20.00
$20.00

Increasing interest in utilizing hydrofluoric acid (HF) for acid stimulation of wells in the Gulf of Mexico to improve hydrocarbon productivity raised the question of acid chemical compatibility with existing offshore production system components particularly riser titanium alloy stress joints (TSJs). A notable concern is the known potential for elevated etch rates and consequent hydrogen absorption on titanium components when exposed to even relatively dilute cold or warm HF-containing solutions. Unfortunately conventional film-forming/adsorption type organic inhibitors offer little inhibitive benefits for titanium alloys exposed to inorganic reducing acid media.This laboratory corrosion test screening program specifically aimed at identifying practical common inorganic salts which when added to warm dilute HF solutions provide effective corrosion inhibition for UNS R56404 (ASTM Grade 29 Titanium). The study revealed that aluminum molybdate or borate salt additions and certain combinations thereof can be potent etch inhibitors when added in certain minimum molar ratios to the fluoride present. Effective inhibition was achieved over the 0.3- 1.0 wt% HF acid levels and 125F-175F conditions tested in stagnant and flowing fluids. Suggested guidelines for formulating promising injected salt solutions for inhibiting spent HF acid return fluids for titanium components based on this database are offered.

Key words: titanium, well acidizing, acid stimulation, hydrofluoric acid, corrosion inhibitor

Increasing interest in utilizing hydrofluoric acid (HF) for acid stimulation of wells in the Gulf of Mexico to improve hydrocarbon productivity raised the question of acid chemical compatibility with existing offshore production system components particularly riser titanium alloy stress joints (TSJs). A notable concern is the known potential for elevated etch rates and consequent hydrogen absorption on titanium components when exposed to even relatively dilute cold or warm HF-containing solutions. Unfortunately conventional film-forming/adsorption type organic inhibitors offer little inhibitive benefits for titanium alloys exposed to inorganic reducing acid media.This laboratory corrosion test screening program specifically aimed at identifying practical common inorganic salts which when added to warm dilute HF solutions provide effective corrosion inhibition for UNS R56404 (ASTM Grade 29 Titanium). The study revealed that aluminum molybdate or borate salt additions and certain combinations thereof can be potent etch inhibitors when added in certain minimum molar ratios to the fluoride present. Effective inhibition was achieved over the 0.3- 1.0 wt% HF acid levels and 125F-175F conditions tested in stagnant and flowing fluids. Suggested guidelines for formulating promising injected salt solutions for inhibiting spent HF acid return fluids for titanium components based on this database are offered.

Key words: titanium, well acidizing, acid stimulation, hydrofluoric acid, corrosion inhibitor

Product tags
Also Purchased
Picture for Behavior of Titanium Exposed to Fresh and Spent Dilute HF Acid Well Stimulation Fluids
Available for download

51318-10863-Behavior of Titanium Exposed to Fresh and Spent Dilute HF Acid Well Stimulation Fluids

Product Number: 51318-10863-SG
Author: Ronald W. Schutz / Heath W. Walker
Publication Date: 2018
$20.00

UNS R56404Titanium exposure to warm, naturally-aerated, dilute, HF-containing, fresh acid mixtures does result in unacceptable, elevated etch rates. Several common inorganic salts such as aluminum, molybdate, and/or borate salts, inhibit this attack.
Picture for Mercury Liquid Metal Embrittlement of ASTM Grade 29 Titanium
Available for download

Mercury Liquid Metal Embrittlement of ASTM Grade 29 Titanium

Product Number: 51316-7556-SG
ISBN: 7556 2016 CP
Author: Ronald Schutz
Publication Date: 2016
$20.00

Results of exposing UNS R56404 forging and pipe product forms to liquid mercury over the 25°-232°C range while highly stressed at & beyond the alloy’s yield point via three  loading modes are reported. Included are: sustained load 90 day C-ring tests, slow strain rate tensile testing, and rippled slow strain rate cyclic tensile loading.

 
Picture for 00691 EXPERIENCE WITH TITANIUM HEAT EXCHANGERS
Available for download

00691 EXPERIENCE WITH TITANIUM HEAT EXCHANGERS IN REFINERY SERVICES

Product Number: 51300-00691-SG
ISBN: 00691 2000 CP
Author: Deyuan Fan, William C. Fort ili, Richard J. Horvath
Publication Date: 2000
$20.00

Several experiences with the use of titanium heat exchangers in refining processes are summarized. These involve distillation column overhead condensers in atmospheric crude distilling units, fluid catalytic cracking units, delayed coking units, and sour water strippers. The causes of problems are discussed. Needs for additional data are highlighted.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support