9-997_L 耐蚀钢钝化

Rev. L
SPECIFICATION 9-997
Page 1 of 8 Amphenol Corporation FSCM NO. 77820 Sidney, New York
U
“SEE WARNING NOTE”
TITLE
FINISH
DESCRIPTION
PASSIVATING OF STAINLESS AND
CORROSION RESISTANT TYPE STEEL
Revisions
REV. LETTER ISSUE NUMBER ORIGINATOR DATE APPROVAL
L B3114 P. FRISCH 2-8-12
Document Origination (Amphenol)
APPROVALS: SIGNATURES
PREPARED BY: Mark Barnes
ENGINEER IN CHARGE: Alan Davis
DESIGN MANAGER: Alan Davis
DESIGN ACTIVITY GROUP: Plating / Sept. 2005
DATE: September 13, 2005
Eng’r Form: SC-933 Revised 10/8/10
9-997 Rev. L
AMPHENOL CORPORATION FSCM NO. 77820
Sidney, NY 13838
Page 2 of 8
1.0SCOPE:
1.1 This specification pertains to the passivating of stainless and corrosion resistant steels to promote
corrosion protection by removing surface contamination.
2.0APPLICABLE DOCUMENTS:
The following specifications of the latest issue in effect on date of issuance forms a part of this specification to the extent specified herein:
2.1 Federal Specification(s):
MIL-STD-171 Finishing of Metal and Wood Surfaces
2.2American Society for Testing and Materials (ASTM) Standards:
ASTM B254 Standard Practice for Preparation of an Electroplating on
Stainless Steel
ASTM A380 Practice for Cleaning and Descaling Stainless Steel Parts,
Equipment and Systems
ASTM A967 Chemical Passivation Treatments for Stainless Steel Parts,
Standard Specification
2.3Society of Automotive Engineers (SAE):
SAE AMS 2700 Passivation of Corrosion Resistant Steels
2.4Amphenol Corporation:
9-4590 Electropolishing 300 Series Stainless Steel, Procedure for
3.0 TECHNICAL REQUIREMENTS:
3.1 Pre-Treatment of Parts:
3.1.1 Parts shall be thoroughly cleaned of oil, grease, and dirt as well as any forming, drawing, cutting
and grinding compounds using suitable thinners, degreasers, solvents or cleaners.
3.1.2 If, after cleaning, parts show evidence of rusting or heat treat scale, they shall be further cleaned
with permanganate solutions, inorganic acids, or mechanical means to remove scale and rust.
The discoloration caused by hardening treatment on 17-4 PH, 17-7 PH and 400 series alloys shall be removed by mechanical means or with potassium permanganate-sodium hydroxide solution.
Acid cleaning of these alloys shall be avoided due to hydrogen embrittlement problems.
AMPHENOL CORPORATION FSCM NO. 77820
Sidney, NY 13838
Page 3 of 8
3.0 TECHNICAL REQUIREMENTS: (continued)
3.2 Processing Solutions:
3.2.1 Solution Type Nitric 1 (SAE AMS 2700 Type 2):
Nitric Acid (Commercial Grade) 20-25 % B.V.
Sodium Dichromate (Commercial Grade) 2-3% B.W.
Distilled or Deionized Water Balance
Temperature 120°-130° F
Time 20-30 minutes
3.2.2 Solution Type Nitric 2 (SAE AMS 2700 Type 6):
Nitric Acid (Commercial Grade) 25-45% B.V.
Distilled or Deionized Water Balance
Temperature 70°-90° F
Time 30-45 minutes
3.2.3 Solution Type Nitric 3 (SAE AMS 2700 Type 7):
Nitric Acid (Commercial Grade) 20-25% B.V.
Distilled or Deionized Water Balance
Temperature 120°-150° F
Time 20-30 Minutes
3.2.4 Solution Type Nitric 4 (SAE AMS 2700 Type 8):
Nitric Acid (Commercial Grade) 45-55% B.V.
Distilled or Deionized Water Balance
Temperature 120°-130° F
Time 30-40 Minutes
3.3 Passivation Treatment:
3.3.1 Anodically clean parts in a caustic based (etch type) cleaner for 15-20 minutes at 3-6 volts.
3.3.2 Rinse thoroughly in cold running water.
3.3.3 Immerse parts in one of the Processing Solutions listed in paragraph 3.2. The following listing is
provided as a guide for choosing the type of solution to use for a particular alloy:
(See also Reference Table 1 in Appendix.)
AMPHENOL CORPORATION FSCM NO. 77820
Sidney, NY 13838
Page 4 of 8
3.0TECHNICAL REQUIREMENTS: (continued)
3.3.3 (continued)
Solution Type Nitric 1: (SAE AMS 2700 Type 2)
•All precipitation hardened steels (17-4 PH, 17-7 PH).
•Most high chromium/high carbon 400 series (440) (not S44600 (446) per
Table 1).
•Most straight chromium 400 series (not S43000 (430) per Table 1).
•Free machine 300 series steels (not Austenitic steels).
Solution Type Nitric 2: (SAE AMS 2700 Type 6)
•All 200 series Austenitic steels.
•All 300 series Austenitic steels D33.
Solution Type Nitric 3: (SAE AMS 2700 Type 7)
•Most ferritic steels (not 405, 409 or 420 per Table 1).
•Most Austenitic steels (not 304H, 316H, 321H or 347H per Table 1).
NOTE: Nitric 3 only needs to be used for 430 or 446 steels. Others are covered by Nitric
1, 2 or 4.
Solution Type Nitric 4: (SAE AMS 2700 Type 8)
•All precipitation hardened steels (17-4 PH & 17-7 PH).
•Most high chromium/high carbon 400 series (440).
•Most straight chromium 400 series.
NOTE: Electropolishing is an acceptable passivation alternative for some 300 series steels per Amphenol specification 9-4590.
The parts shall be completely immersed in the solution to avoid severe etching which would
otherwise occur above the liquid line. Care must also be taken to avoid excessive immersion time that may damage parts. For guidance on specific alloys, contact the Amphenol Engineering.
Parts containing blind holes should be held under vacuum to remove entrapped air.
3.3.4 Rinse parts immediately after removal from the passivating solution in clean cold running water.
3.3.5 When specified and immediately after rinsing, all 400 series stainless steel parts shall be
immersed in an aqueous solution containing 4-6% by weight of technical grade sodium
dichromate operated at 140°-160°F (60°-71° C) for 30 minutes.
3.3.6 Rinse thoroughly in running cold water. Parts containing blind holes shall be rinsed under
vacuum until water is clear and then vacuum rinsed in clean isopropyl alcohol.
AMPHENOL CORPORATION FSCM NO. 77820
Sidney, NY 13838
Page 5 of 8
3.0 TECHNICAL REQUIREMENTS: (continued)
3.3.7 Soaking parts in the cleaner solution specified in Paragraph 3.3.1 can be used to eliminate
staining that may occur after passivating. Rinse per 3.3.6.
3.3.8 Dry by suitable means.
3.4 Powdered Metal Parts: Test only per Paragraph
4.2 to insure passivity.
4.0 QUALITY ASSURANCE PROVISIONS:
4.1 Appearance:
The passivated parts shall exhibit a chemically clean surface and shall show no etching, pitting, frosting resulting from passivation procedures.
4.2 Lot Size and Frequency of Testing:
4.2.1 Lot Size: The passivated parts of similar alloy and manufacturing methods that are pretreated and
passivated in a single day or within a time frame that will ensure consistent passivation results.
The test for passivation specified in 4.3 shall be performed on a sample from each lot of stainless steel parts.
4.3 Test for Passivation: The copper solution specified below shall be swabbed on surface of the
sample representing the passivated parts, applying additional solution as needed to keep the
surface set for a period of six minutes. At the end of this period, the surface of the samples shall be carefully washed, rinsed, and dried so as not to disturb as immersion copper. If no copper has plated out on the surface of the steel, the parts shall be considered acceptable. This test is not
applicable to 400 series stainless steels.
Copper Sulfate Solution:
Copper Sulfate (CuSO4 5H2O) 4 grams
Sulfuric Acid (H2SO4) 1-1.5 ml.
Distilled Water 250 ml.
Temperature Ambient
Shelf life - Mandatory Two weeks
4.4 Rejection and Retest:
Any lot failing to meet the requirements specified herein shall be rejected. A rejected lot may be resubmitted for inspection provided the defective parts have been repassivated and retested,
using a sample size that is twice the original sample size.
AMPHENOL CORPORATION FSCM NO. 77820
Sidney, NY 13838
Page 6 of 8
5.0 NOTES:
5.1 Approval:
No part shall be treated in accordance with this specification until the baths and methods of
processing have been approved by Amphenol Engineering Department and after approval no
change shall be made in processes without further approval.
6.0 SAFETY:
6.1 Warning Notes:
6.1.1 This process uses hazardous materials. Degreasing solvents can be harmful. Acetone and alcohol
are flammable - keep away from all sources of ignition. Avoid skin and eye contact with solvents and processing solutions - wear protective clothing. Avoid breathing fumes. If skin or eye
contact occurs, flush with large amounts of water and seek medical attention. If breathing is
affected, remove person to fresh air and seek medical attention.
6.1.2 This specification contains hazardous materials. Proper protective eye shields, gloves and aprons
shall be worn during all handling and use. All processing solutions listed in Paragraph 3.0 shall be properly vented and all operators and handlers shall avoid breathing fumes. All accidental
spills on person or clothing shall be reported to First Aid immediately after washing with clean fresh water.
AMPHENOL CORPORATION FSCM NO. 77820
Sidney, NY 13838
Page 7 of 8
APPENDIX
REFERENCE TABLE 1
Derived from “TABLE 4 – RECOMMENDED PASSIVATION SOLUTIONS” from AMS 2700E 9-997 Nitric 1 Nitric 2 Nitric 3 Nitric 4 SAE AMS 2700 Type 2 Type 6 Type 7 Type 8 Alloy
AUSTENITIC
S20100 (201) X X X
S20200 (202) X X X
S21800 (Nitronic 60®) X X X
S21900 (Nitronic 40®) X X X
S30100 (301) X X X
S30200 (302) X X X
S30400 (304) X X X
S30403 (304L) X X X
S30409 (304H) X X X
S30430 (302HQ) X X X
S30451 (304N) X X X
S30500 (305) X X X
S30800 (308) X X X
S30900 (309) X X X
S30908 (309S) X X X
S30940 (309Cb) X X X
S3100 (310) X X X
S31008 (310S) X X X
S31100 (311) X X X
S31400 (314) X X X
S31500 (315) X X X
S31600 (316) X X X
S31603 (316L) X X X
S31609 (316H) X X X
S32100 (321) X X X
S32109 (321H) X X X
S32900 (329) X X X
S34700 (347) X X X
S34709 (347H) X X X FERRITIC
S40500 (405) X X
S40900 (409) X X
S42900 (429) X X X
S43000 (430) X X
S43400 (434) X X
S43600 (436) X X
S44200 (442) X X
S44600 (446) X X
S44625 (XM-27) X X
AMPHENOL CORPORATION FSCM NO. 77820
Sidney, NY 13838
Page 8 of 8
APPENDIX
REFERENCE TABLE 1
(continued)
9-997 Nitric 1 Nitric 2 Nitric 3 Nitric 4 SAE AMS 2700 Type 2 Type 6 Type 7 Type 8 Alloy
FREE MACHINING
S30300 (303) X
S30310 (303X) X
S30323 (303Se) X
S30330 (303Cu) X
S30345 (303MA) X
S30360 (303Pb) X
S4720 (347S) X
S34723 (347Se) X
S43020 (430F) X
S43023 (430FSe) X
S44020 (440F) X
S44023 (440FSe) X
MARTENSITIC
S40300 (403) X X
S41000 (410) X X
S41400 (414) X X
S41600 (416) X
S41623 (416Se) X
S41800 (Greek Ascoloy) X X
S42000 (420) X
S43100 (431) X X
S44002 (440A) X X
S44003 (440B) X X
S44004 (440C) X X PRECIPITATION
HARDENING
K66286 (A286) X X
S13800 (13-8Mo) X X
S15500 (15-5) X X
A15700 (15-7Mo) X X
S17400 (17-4) X X
S17700 (17-7) X X
S35000 (AM350) X X
S35500 (AM355) X X
S36200 (Almar 362) X X。