WO2003066544A1 - Decoppering agent - Google Patents
Decoppering agent Download PDFInfo
- Publication number
- WO2003066544A1 WO2003066544A1 PCT/SE2003/000028 SE0300028W WO03066544A1 WO 2003066544 A1 WO2003066544 A1 WO 2003066544A1 SE 0300028 W SE0300028 W SE 0300028W WO 03066544 A1 WO03066544 A1 WO 03066544A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bismuth
- propellant
- tin
- decoppering agent
- decoppering
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/24—Cartridges, i.e. cases with charge and missile for cleaning; for cooling; for lubricating ; for wear reducing
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/04—Compositions characterised by non-explosive or non-thermic constituents for cooling the explosion gases including antifouling and flash suppressing agents
Definitions
- This invention relates to an addition to every kind of propellant effective for removing copper deposits from the inside surfaces of a gun barrels. More particularly, a composite addition has a pulverized decoppering agent mixed into the propellant.
- Most guns have a barrel with a rifled internal bore that imparts a stabilizing spin on an expelled projectile.
- the internal bore may be coated with a hard facing material, such as chromium, to minimize erosive wear increasing the number of projectiles that may be fired from the gun.
- the typical large caliber projectile has a diameter slightly less than the diameter of the internal bore.
- One or more obturator, or rotating, bands gird the circumference of the projectile. At the bands, the diameter of the projectile is slightly larger than the internal diameter of the gun barrel.
- the rotating band is engraved by the rifling, contacting the rifling throughout the length of the tube imparting the projectile with a stabilizing spin.
- Projectiles for rifles and pistols normally do not have a rotating band but they very often have a jacket made of tombac, which is engraved by the rifling.
- the gun barrel is manufactured from a material such as steel and sometimes coated with a hard material such as a chromium facing.
- the gun barrel is harder than the rotating band or jacket, which is typically copper or a copper alloy.
- This copper deposition referred to as "copper fouling" can affect the ballistics of the projectile and major fouling can prevent the projectile from being inserted and seated, positioned in the barrel prior to firing, properly.
- Copper fouling is currently a major problem for large artillery weapons, such as 155- millimeter howitzers, and is also noted in small and medium caliber cannons, such as 20-millimeter canons. It has become a bigger problem in rifles today because of the use of the lead-free primers. Before the primer contained lead and that small amount of lead worked as a decoppering agent. The current solution to copper fouling is including a decoppering agent into the propellant. The decoppering agent removes the copper without damaging the gun barrel or the rifling.
- a common decoppering agent is a sheet of lead foil deposited between the propellant and the projectile. On ignition of the propellant charge, the lead is vaporized and diffuses into the copper. The resultant alloy is brittle and easily shattered. The combination of the heat generated by the burning propellant and the mechanical movement of the propellant gases separates the brittle lead copper alloy from the surface of the barrel. The fractured debris is swept from the muzzle of the gun with the propellant gases.
- lead foil is effective as a decoppering agent is that the heat generated by the burning propellant melts the lead foil. Liquid lead contacts the copper deposition and dissolves the copper, the copper bearing lead solution is expelled as a liquid from the muzzle with the propellant gases.
- the decoppering agent consists essentially of a lead- free pulverized additive mixed together with the other propellant compounds.
- a mixture of tin and bismuth is a very good decoppering agent.
- the ratio between tin and bismuth are between 10 - 62 % Sn and 90 - 38 %Bi.
- the melting point for this combination is 138 degree C. Much lower than each of the components. It can be all kinds of suitable tin and bismuth compounds.
- the bismuth and tin either vaporizes or liquifies when the propellant is ignited and either embrittles or dissolves the copper deposits facilitating removal.
- the decoppering agent is distributed to the barrel and trough the barrel with the propellant gases.
- the decoppering agent is included in the propellant that also means that the powder gases always contains the same amount of decoppering agent.
- the biggest advantage with this invention is that the decoppering agent always is there, it makes the loading easier and cheaper. No need for extra containers with especially made substances for decoppering.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Powder Metallurgy (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Lubricants (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Paints Or Removers (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicines Containing Plant Substances (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020047012179A KR100950907B1 (ko) | 2002-02-08 | 2003-01-13 | 구리 제거제 |
BRPI0307511-7A BR0307511B1 (pt) | 2002-02-08 | 2003-01-13 | agente de desencobrear para uma carga de projeção. |
EA200401051A EA006416B1 (ru) | 2002-02-08 | 2003-01-13 | Размеднитель |
DE60331890T DE60331890D1 (de) | 2002-02-08 | 2003-01-13 | Entkupferungsmittel |
CA002475497A CA2475497A1 (en) | 2002-02-08 | 2003-01-13 | Decoppering agent |
EP03700650A EP1472199B1 (en) | 2002-02-08 | 2003-01-13 | Decoppering agent |
JP2003565922A JP4298512B2 (ja) | 2002-02-08 | 2003-01-13 | 脱銅剤 |
ROA200400705A RO122058B1 (ro) | 2002-02-08 | 2003-01-13 | Agent de îndepărtare a stratului de cupru pentru un agent propulsiv |
AU2003201797A AU2003201797A1 (en) | 2002-02-08 | 2003-01-13 | Decoppering agent |
HU0402655A HU228870B1 (en) | 2002-02-08 | 2003-01-13 | Decoppering agent |
AT03700650T ATE462680T1 (de) | 2002-02-08 | 2003-01-13 | Entkupferungsmittel |
IL163376A IL163376A (en) | 2002-02-08 | 2004-08-05 | Decoppering agent |
US10/913,426 US20050115452A1 (en) | 2002-02-08 | 2004-08-09 | Decoppering agent |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0200366A SE523997C2 (sv) | 2002-02-08 | 2002-02-08 | Avkoppringsmedel |
SE0200366-3 | 2002-02-08 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/913,426 Continuation US20050115452A1 (en) | 2002-02-08 | 2004-08-09 | Decoppering agent |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003066544A1 true WO2003066544A1 (en) | 2003-08-14 |
Family
ID=20286899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2003/000028 WO2003066544A1 (en) | 2002-02-08 | 2003-01-13 | Decoppering agent |
Country Status (17)
Country | Link |
---|---|
US (1) | US20050115452A1 (ru) |
EP (1) | EP1472199B1 (ru) |
JP (1) | JP4298512B2 (ru) |
KR (1) | KR100950907B1 (ru) |
CN (1) | CN1290803C (ru) |
AT (1) | ATE462680T1 (ru) |
AU (1) | AU2003201797A1 (ru) |
BR (1) | BR0307511B1 (ru) |
CA (1) | CA2475497A1 (ru) |
DE (1) | DE60331890D1 (ru) |
EA (1) | EA006416B1 (ru) |
HU (1) | HU228870B1 (ru) |
IL (1) | IL163376A (ru) |
RO (1) | RO122058B1 (ru) |
SE (1) | SE523997C2 (ru) |
WO (1) | WO2003066544A1 (ru) |
ZA (1) | ZA200406262B (ru) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10350024A1 (de) * | 2003-10-27 | 2005-05-25 | Metallwerk Elisenhütte GmbH | Patrone mit nachweisrelevanter Dotierung |
CN111486744A (zh) * | 2020-04-14 | 2020-08-04 | 重庆兴勇实业有限公司 | 一种枪械除铜剂及其制备方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011123398A1 (en) * | 2010-03-30 | 2011-10-06 | Lockheed Martin Corporation | Methods for rework of a solder |
CA2990862C (en) * | 2015-07-03 | 2022-05-31 | Nitrochemie Wimmis Ag | Propelling charge system for artillery shells |
JP6727730B2 (ja) * | 2017-09-19 | 2020-07-22 | 旭精機工業株式会社 | 弾丸及び銃弾 |
CN111363950B (zh) * | 2020-04-21 | 2021-05-28 | 中北大学 | 一种枪用合金除铜剂和制备方法 |
CN113154938A (zh) * | 2021-04-07 | 2021-07-23 | 中北大学 | 一种高效环保合金除铜剂及其制备方法与应用 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5463956A (en) * | 1994-02-08 | 1995-11-07 | Ici Americas Inc. | Wear decoppering liner |
WO1996018862A1 (en) * | 1994-12-16 | 1996-06-20 | Primex Technologies, Inc. | Composite decoppering additive for a propellant |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL9302056A (nl) * | 1993-11-26 | 1995-06-16 | Billiton Witmetaal | Kogel en het gebruik van een Sn-legering daarvoor. |
JP2002025403A (ja) * | 2000-07-03 | 2002-01-25 | Sorudaa Kooto Kk | 温度ヒューズおよび温度ヒューズ素子用線材 |
-
2002
- 2002-02-08 SE SE0200366A patent/SE523997C2/sv not_active IP Right Cessation
-
2003
- 2003-01-13 RO ROA200400705A patent/RO122058B1/ro unknown
- 2003-01-13 EA EA200401051A patent/EA006416B1/ru not_active IP Right Cessation
- 2003-01-13 HU HU0402655A patent/HU228870B1/hu not_active IP Right Cessation
- 2003-01-13 CA CA002475497A patent/CA2475497A1/en not_active Abandoned
- 2003-01-13 DE DE60331890T patent/DE60331890D1/de not_active Expired - Lifetime
- 2003-01-13 KR KR1020047012179A patent/KR100950907B1/ko not_active IP Right Cessation
- 2003-01-13 JP JP2003565922A patent/JP4298512B2/ja not_active Expired - Fee Related
- 2003-01-13 AU AU2003201797A patent/AU2003201797A1/en not_active Abandoned
- 2003-01-13 AT AT03700650T patent/ATE462680T1/de not_active IP Right Cessation
- 2003-01-13 EP EP03700650A patent/EP1472199B1/en not_active Expired - Lifetime
- 2003-01-13 CN CNB038033666A patent/CN1290803C/zh not_active Expired - Fee Related
- 2003-01-13 WO PCT/SE2003/000028 patent/WO2003066544A1/en active Application Filing
- 2003-01-13 BR BRPI0307511-7A patent/BR0307511B1/pt not_active IP Right Cessation
-
2004
- 2004-01-01 ZA ZA200406262A patent/ZA200406262B/xx unknown
- 2004-08-05 IL IL163376A patent/IL163376A/en not_active IP Right Cessation
- 2004-08-09 US US10/913,426 patent/US20050115452A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5463956A (en) * | 1994-02-08 | 1995-11-07 | Ici Americas Inc. | Wear decoppering liner |
WO1996018862A1 (en) * | 1994-12-16 | 1996-06-20 | Primex Technologies, Inc. | Composite decoppering additive for a propellant |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10350024A1 (de) * | 2003-10-27 | 2005-05-25 | Metallwerk Elisenhütte GmbH | Patrone mit nachweisrelevanter Dotierung |
CN111486744A (zh) * | 2020-04-14 | 2020-08-04 | 重庆兴勇实业有限公司 | 一种枪械除铜剂及其制备方法 |
CN111486744B (zh) * | 2020-04-14 | 2022-07-22 | 重庆兴勇实业有限公司 | 一种枪械除铜剂及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4298512B2 (ja) | 2009-07-22 |
CN1628085A (zh) | 2005-06-15 |
AU2003201797A1 (en) | 2003-09-02 |
BR0307511B1 (pt) | 2011-10-04 |
SE0200366D0 (sv) | 2002-02-08 |
US20050115452A1 (en) | 2005-06-02 |
HU228870B1 (en) | 2013-06-28 |
CA2475497A1 (en) | 2003-08-14 |
SE0200366L (sv) | 2003-08-09 |
EA006416B1 (ru) | 2005-12-29 |
BR0307511A (pt) | 2004-12-07 |
EA200401051A1 (ru) | 2005-02-24 |
KR20040102005A (ko) | 2004-12-03 |
EP1472199B1 (en) | 2010-03-31 |
KR100950907B1 (ko) | 2010-04-05 |
RO122058B1 (ro) | 2008-11-28 |
ATE462680T1 (de) | 2010-04-15 |
IL163376A (en) | 2009-12-24 |
EP1472199A1 (en) | 2004-11-03 |
CN1290803C (zh) | 2006-12-20 |
JP2005517146A (ja) | 2005-06-09 |
DE60331890D1 (de) | 2010-05-12 |
HUP0402655A2 (hu) | 2005-08-29 |
ZA200406262B (en) | 2008-01-30 |
SE523997C2 (sv) | 2004-06-15 |
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