MIL-STD-202H.pdf - 第211页

MI L - S TD - 202 -2 1 5 CO NT E N T S PARAGRAPH PAG E FOREW ORD … ………………………………………………………. ii 1. SCOPE 1 1.1 Purpose …… ………………… …………………. …… .. …………. 1 1.2 Formulati on o f s ol v ent s ……… …………. ……. ……. . …………. 1 1.3 Chec…

MIL-STD-202-215

FOREWORD

1. This standard is approved for use by all Departments and Agencies of the Department of Defense.

2. This entire standard has been revised. This revision has resulted in many changes to the format, but the most

significant one is the splitting the document into test methods. See MIL-STD-202 for the change summary.

3. Comments, suggestions, or questions on this document should be emailed to std202@dla.mil or addressed to:

Commander, Defense Logistics Agency, DLA Land and Maritime, ATTN: VAT, P.O. Box 3990, Columbus, OH

43218–3990. Since contact information can change, you may want to verify the currency of this address

information using the ASSIST Online database at https://assist.dla.mil.

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MIL-STD-202-215

CONTENTS

PARAGRAPH PAGE

FOREWORD…………………………………………………………. ii

1. SCOPE 1

1.1 Purpose………………………………………….……..…………. 1

1.2 Formulation of solvents………………….…….……..…………. 1

1.3 Checks for conflicts………………..……………………………. 1

2. APPLICABLE DOCUMENTS 1

2.1 Specifications, standards, and handbooks…………………… 1

3. DEFINTIONS 1

4. GENERAL REQUIREMENTS 2

4.1 Materials ……………….…….…………………….….........……. 2

4.1.1 Solvent solutions..................................................................... 2

4.1.1.1 Solvent solutions, safety aspects ……………………..………. 2

4.1.2 Vessel….……….…….………….………….………...…………. 2

4.1.3 Brush..…………………………..…….………………..…………. 2

4.2. Procedure…………….………………………..….….………….. 3

4.2.1 Groups………………………………………..……..……………. 3

4.2.2 Optional exposure procedure for the third group…………….. 3

4.2.3 Immersion test for components with marking protected

by a sleeve material…………………………..……..……….…. 4

4.2.4 Open construction parts and parts not intended

for PCB mounting………………………………………………... 4

5. DETAILED REQUIREMENTS 4

5.1 Summary…………………………………………..…..…………. 4

5.2. Examination and measurements…………………………....…. 4

5.2.1 Marking resistance to solvents…….……………..……………. 4

5.2.2 Component protective coating, encapsulation material

and sleeve material resistance….……………..………………. 4

6. NOTES 6

6.1 Supersession data………………………………………………. 6

TABLES PAGE

I. Summary table for resistance to solvents…..……………………….…… 5

iii

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MIL-STD-202-215

METHOD 215

RESISTANCE TO SOLVENTS

1. SCOPE

1.1 Purpose. The purpose of this test is as follows:

a. To verify that markings or color coding will not become illegible or discolored on the parts (including printed

wiring boards) when subjected to solvents and processes normally used to clean solder flux, fingerprints,

and other contaminants from printed-wiring and terminal-board assemblies, etc.

b. To verify that component protective coatings and encapsulant materials are not degraded to the point

where electrical or mechanical integrity is disturbed when subjected to solvents and processes normally

used to clean solder flux, fingerprints, and other contaminants from printed wiring and terminal board

assemblies, etc.

1.2 Formulation of solvents. The formulation of solvents is considered typical and representative of the solvents

used in printed wiring assembly processing of electronic components. Processing conditions are representative of

processes used for printed wiring assembly.

1.3 Checks for conflicts. When this test is referenced, care should be exercised to assure that conflicting

requirements, as far as the properties of the specified finishes and markings are concerned, are not invoked.

2. APPLICABLE DOCUMENTS

2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part

of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those

cited in the solicitation or contract.

FEDERAL SPECIFICATIONS

TT-I-735 - Isopropyl Alcohol

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-PRF-680 - Degreasing Solvent

(Copies of these documents are available online at http://quicksearch.dla.mil)

3. DEFINTIONS

This section not applicable to this standard.

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