Both AMS 2700 and ASTM A967 base their nitric acid passivation methods on using 42° Baume nitric acid. The Baume scale is a measurement of specific gravity. Positive degrees of Baume indicate chemicals or solutions denser than water. 42° Baume nitric acid corresponds to a 1.4 specific gravity solution of nitric acid that is roughly 67% …
1.1 This practice covers recommendations and precautions for cleaning, descaling, and passivating of new stainless steel parts, assemblies, equipment, and installed systems. These recommendations are presented as procedures for guidance when it is recognized that for a particular service it is desired to remove surface contaminants that …
ASTM A967/A967M, 2017 Edition, July 1, 2017 - Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts This specification covers several different types of chemical passivation treatments for stainless steel parts. It includes recommendations and precautions for descaling, cleaning, and passivation of stainless …
With that roman numeral type reccomendation from QQ-P-35 in hand, you can make a corresponding AMS 2700 (Method 1) callout by changing the roman numberal to the corresponding arabic numneral as shown below: QQ-P-35, Type II: AMS 2700, Method 1, Type 2. QQ-P-35, Type VI: AMS 2700, Method 1, Type 6.
2.1 ASTM Standards:2 A380/A380M Practice for Cleaning, Descaling, and Passi-vation of Stainless Steel Parts, Equipment, and Systems A967/A967M Specification for Chemical Passivation Treat-ments for Stainless Steel Parts B117 Practice for Operating Salt Spray (Fog) Apparatus B322 Guide for Cleaning Metals Prior to Electroplating
Chemical Passivation Treatments for Stainless Steel Parts (Replaced by ASTM-A967/A967M) Scope: This specification covers several different types of chemical …
ASTM A967/A967M-17. July 1, 2017. Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts. 1.1 This specification covers several …
Scope. 1.1 This specification covers several different types of chemical passivation treatments for stainless steel parts. It includes recommendations and precautions for descaling, cleaning, and passivation of stainless steel parts. It includes several alternative tests, with acceptance criteria, for confirmation of effectiveness of …
ASTM A380: Finishes for Ground Based Electronic Equipment: Table IV, Finish number E300; MIL-DTL-5002: ASTM A967 AMS 2700: Surface Treatments and Inorganic Coatings For Metal Surfaces of Weapons Systems: Section 3.8.6; MIL-STD-171: ASTM A967 AMS 2700 ASTM A380: Finishing of Metal and Wood Surfaces: Section 5.1.4.2; Table V, …
The standard ASTM-A967 covers several different types of chemical passivation treatments for stainless steel parts. Then we find that the classification is similar but a little different in details than that in AMS2700B. 1. Treatments in Nitric Acid Solutions. There are types of Nitric 1, Nitric 2, Nitric 3, Nitric 41, Nitric 5. ...
Per ASTM A967 and A380, stainless parts are shown to be properly passivated if they resist corrosion in salt spray for just 2 hours. Stainless steel performs relatively poorly in salt spray because the constant exposure to a harsh environment rapidly erodes the passivation layer and prevents it from reforming.
Delstar is the industry leader in stainless steel passivation services, delivering the highest quality of passivated products to our customers since 2002. Here at Delstar Metal Finishing, we offer stainless steel passivation services with a focus on ASTM A967, ASTM A380, ASTM B912, and QQP35C specifications. Call or contact us today to speak to ...
ASTM B 117 salt spray testing for 2 to 3 hours, and then evaluated for signs of red rust. Red rust is considered a failure for passivation. In addition, the stainless steel test specimens were also examined for signs of IGA (intergranular attack) and pitting after being treated in the optimized nitric, optimized citric acid, and 3
The following spec refers to ASTM A380 for passivation of stainless steel and thus allows the use of ASTM A967: MIL-DTL-14072D/E/F (Table IV. Finish E300) The spec MIL-T-704K in section 3.2.6 directly describes a passivation process analogous to QQ-P-35's type II followed by a chromate post-treatment. However, QQ-P-35 assigns this process as ...
ASTM A967-01 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts . 1. Scope(범위) * Stainless Steel 의 descaling, cleaning, passivation 에 대한 권고 및 예방책을 제시한다.
Revision of A967/A967M-17 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts. Rationale. ... ASTM Standard C33, 2003e1, "Specification for Concrete Aggregates," ASTM International, West Conshohocken, PA, 2003, DOI: 10.1520/C0033 ...
ASTM International [astm] PDF Price. $57.00. Add to cart Not a Member? Find out how to get ANSI Member Discount Others Also Bought. ASTM A380/A380M-17. Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems ... ASTM A967/A967M-13; Included in Packages.
Solution strengths of 4-10% citric acid are specified for passivation treatments in ASTM A967. Specifications for passivation treatments for stainless steels. Traditionally the American standards have been used. These include: – ASTM A380 – Practice for Cleaning, Descaling and Passivating of Stainless Steel Parts, Equipment and Systems
Chemical Passivation. The chemical treatment removing the free iron from the surface of stainless steel is called passivation. The chemical used is most commonly nitric acid (HNO 3 ), a highly corrosive mineral acid. This acid was specifically called for in SAE AMS-QQ-P-35 which was the standard used throughout the aerospace industry into …
A citric acid passivation bath also takes far less time than nitric acid, speeding up the cleaning process considerably. However, for all these benefits, citric acid passivation is considerably more expensive, which is why many choose nitric acid to keep costs down. ASTM A967 details five different citric acid passivation methods: Citric 1: 4 ...
The ASTM A967/A967-13 replaces ASTM A967/A967M-05 which is now obsolete. Keywords. cleaning of stainless steel; passivation; passivation tests; tests for cleanliness …
ASTM A967/A967M-17 (CITRIC ACID) 7.1.1.1 Citric 1—The solution shall contain 4 to 10 weight percent of citric acid. The parts shall be immersed for a minimum of 4 min at a temperature in the range from 60 to 70°C [140 to 160°F] 7.1.1.2 Citric 2—The solution shall contain 4 to 10 weight percent of citric acid.
ASTM A967/A967M-13 February 15, 2013 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts 1.1 This specification covers several different types of chemical passivation treatments for stainless steel parts. It includes recommendations and precautions for descaling, cleaning, and...
ASTM A967. General industries use this standard to describe and control the passivation of stainless steel. Passivation is a process of making stainless steel more stainless than it would be if left alone. It is based on using an acid (nitric or citric) under highly controlled conditions to remove free iron particles from the surface and to help form a metal oxide …
Revision of A967/A967M-17 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts. Rationale. A967 was developed for replacement of Mil QQ-P 35. As part of the development, the word "dissolved" appears to be accidental dropped in para. 7.2. for the description of clean water. ... ASTM offers descriptions of …
Buy ASTM A 380/A380M : 2017 practice for cleaning, descaling, and passivation of stainless steel parts, equipment, and systems standard from ASTM. ... (See also Specification A967/A967M.) 1.1.1.3 Passivation is the chemical treatment of a stainless steel with a mild oxidant, such as a nitric acid solution, for the purpose of enhancing the ...
ASTM A 967/A967M : 2017. Current. Add to Watchlist. Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts. Available format (s): Hardcopy, PDF. Language (s): English. Published date: 07-01-2017. Publisher: American Society for Testing and Materials.
ASTM-A967, "Standardization Specification for Chemical Passivation Treatments for Stainless Steel Parts", was adopted on 31-MAR-97 for use by the Department of Defense (DoD). Proposed changes by DoD activities must be submitted to the DoD Adopting Activity: Defense Supply Center Richmond, Attn: DSCR-VFT/VEA, Richmond, VA 23297-5610.
Standards Products Standard Historical Last Updated: Aug 16, 2017 Track Document ASTM A967-05 Standard Specification for Chemical Passivation Treatments …
Stainless Steel Parts, Equipment and Systems. ASTM A967 Standard provides tests with acceptance criteria to demonstrate that the passivation procedures have been successful. As per ASTM International Standards; "passivation testing is the process by which stainless steel will spontaneously form a chemically inactive surface when exposed to ...
Full Description. 1.1 This specification covers several different types of chemical passivation treatments for stainless steel parts. It includes recommendations and precautions for descaling, cleaning, and passivation of stainless steel parts. It includes several alternative tests, with acceptance criteria, for confirmation of effectiveness of ...
A summary of the various nitric acid passivation methods per ASTM A967 is provided below: Nitric 1: 20-25 v% Nitric Acid, 2.5 w% Sodium Dichromate, 120-130F, 20 Mins minimum. Nitric 2: 20-45 v% Nitric Acid, 70-90F, 30 Mins minimum. Nitric 3: 20-25 v% Nitric Acid, 120-140F, 20 Mins minimum. Nitric 4: 45-55 v% Nitric Acid, 120-130F, 30 …
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