ECA EIA-364-26C-2014 TP-26C Salt Spray Test Procedure for Electrical Connectors Contacts and Sockets (2).pdf

1、 EIA STANDARD TP-26C Salt Spray Test Procedure for Electrical Connectors, Contacts and Sockets EIA-364-26C (Revision of EIA 364-26B) March 2014 EIA-364-26C ANSI/EIA-364-26C Approved: March 11, 2014 NOTICE EIA Engineering Standards and Publications are designed to serve the public interest through el

2、iminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not

3、in any respect preclude any member or nonmember of ECIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than ECIA members, whether the standard is to be us

4、ed either domestically or internationally. Standards and Publications are adopted by ECIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, ECIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties a

5、dopting the Standard or Publication. This standard is based upon the major technical content of International Electrotechnical Commission standard 60512-11-6, corrosion, salt mist, 2002-02. It conforms in all essential respects this IEC standard. This Standard does not purport to address all safety

6、problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 5299, formu

7、lated under the cognizance of the CE-2.0 Committee on EIA National Connector and Sockets Standards.) Published by Electronic Components Industry Association 2014 EIA Standards then cool to the specified temperature prior to measuring the specimen solution pH. Only diluted chemically pure hydrochlori

8、c acid or sodium hydroxide shall be used to adjust the pH. The pH measurement shall be made electrometrically using a glass electrode with a saturated potassium-chloride bridge or by colorimetric method provided the results are equivalent to those obtained with the electrometric method. EIA-364-26C

9、Page 3 NOTE Inch equivalents in parentheses. Figure 1 - Salt solution filter Figure 2 - Location of salt solution filter 3 Test specimen 3.1 Description A test specimen shall consist of a connector assembly complete with wires, contacts, sealing plugs and accessories according to the referencing doc

10、ument. EIA-364-26C Page 4 3.2 Preparation 3.2.1 The test specimen shall be mounted with the engaging axis horizontal, unless otherwise specified. 3.2.2 Unless otherwise specified, the connector assembly shall be normally mated. 3.2.3 Connector contacts, when tested separately, shall be mounted with

11、the engaging axis horizontal unless otherwise specified, and mated or unmated as specified in the referencing document. 3.2.4 Unless otherwise specified: 3.2.4.1 The specimens shall be subjected to a minimum of handling, particularly on significant surfaces, and shall be prepared for test immediatel

12、y before exposure. 3.2.4.2 Specimens soiled with oil, dirt or grease shall be cleaned as necessary. 3.2.4.3 Specimens having an intended coating shall not be cleaned with solvent. 3.2.4.4 A suitable coating of wax or similar substance impervious to moisture shall be applied to protect those portions

13、 of specimens that come in contact with the support. In the case of coated specimens, cut edges and surfaces not required to be coated shall also be protected. 4 Test procedure 4.1 Location of specimens The specimens shall be suspended from the top using glass or plastic hooks, waxed twine, string,

14、or nylon thread. If plastic hooks are used, they shall be fabricated of material that is nonreactive to the salt solution. The use of metal hooks is not permitted. The specimens shall be positioned so as to ensure uniform exposure without contacting each other or shielding each other from the freely

15、 settling fog. Corrosion products and condensate from one specimen shall not fall upon another specimen. Parts with blind holes shall be suspended with the hole opening pointing downward whenever possible, unless conflicting with 3.2.1 or 3.2.3. EIA-364-26C Page 5 4.2 Operating conditions 4.2.1 Temp

16、erature The test shall be conducted with a temperature in the exposure zone that is maintained at 35 C +1 C, -2 C (95 F +2 F, -3 F). Satisfactory methods for controlling the temperature accurately include housing the apparatus in a room where the temperature is properly controlled, thoroughly insula

17、ting the apparatus and preheating the air to the proper temperature prior to atomization, and jacketing the apparatus and controlling the temperature of the water or of the air used. The use of immersion heaters for the purpose of maintaining the temperature within the chamber is prohibited. 4.2.2 A

18、tomization 4.2.2.1 The conditions maintained in all parts of the exposure zone shall be such that a suitable receptacle placed at any point in the exposure zone will collect from 0.5 milliliter to 3.0 milliliters of solution per hour for each 80 square centimeters of horizontal collecting area (10 c

19、entimeters diameter) based on an average run of at least 16 hours. The 5% solution collected shall have a sodium-chloride content of from 4% to 6% (specific gravity) in accordance with Figure 3. At least two clean fog-collecting receptacles shall be used, one placed near any nozzle and one placed as

20、 far as possible from all nozzles. Receptacles shall be fastened so that they are not shielded by specimens and so that no drips of solution from specimens or other sources will be collected. The specific gravity and quantity of the solution collected shall be checked following each salt spray test.

21、 Suitable atomization has been obtained in boxes having a volume of less than 0.34 cubic meter (12 cubic feet) with the following conditions: 4.2.2.1.1 Nozzle pressure of from 0.08 MPa to 0.13 MPa (12 lb to 18 lb per square inch). 4.2.2.1.2 Orifices of from 0.5 to 0.7 millimeter (0.02 to 0.03 inch)

22、in diameter. 4.2.2.1.3 Atomization of approximately 2.8 liters (3 quarts) of the salt solution per 0.28 cubic meter (10 cubic feet) of box volume per 24 hours. 4.2.2.2 When using boxes having a volume in excess of 0.34 cubic meter (12 cubic feet), the conditions in 4.2.2.1.1 through 4.2.2.1.3 may ha

23、ve to be modified in order to meet the requirements for operating conditions. EIA-364-26C Page 6 Figure 3 - Variations of specific gravity of salt (NaCl) solution with temperature 4.3 Length of test 4.3 1 The length of the salt spray test shall be indicated in one of the following test conditions, a

24、s specified: Table 1 - Test conditions Test condition Length of test, hours A 96 B 48 C 500 D 1000 4.3.2 Unless otherwise specified, the test shall be run continuously for the time indicated or until definite indication of failure is observed, with no interruption except for adjustment of the appara

25、tus and inspection of the specimen. EIA-364-26C Page 7 4.4 Post cleaning Immediately after exposure, the test specimens shall be dipped in running tap water not warmer than 38 C (100 F) for 5 minutes, maximum and dried for 16 hours maximum, in a circulating air oven at a temperature of 38 C 3 C (100

26、 F 5 F), after which the specimens shall be examined at room temperature. If closer examination of a plated surface is required, the corrosion products may also be removed using any method that will not affect the plating, such as, a soft-hair brush or plastic-bristle brush. Test specimens shall be

27、cleaned in the same condition (mated or unmated) as they were during the exposure period, unless otherwise specified in the referencing document. 4.5 Measurements At the completion of the exposure period, measurements shall be made as specified in the referencing document. 4.6 Examination Perform th

28、e specimen examination(s) in the same mating condition (mated or unmated) as they were during the exposure period, unless otherwise specified in the referencing document. Examination of the connector shall include the following: 4.6.1 Exposure of base metals, pitting and porosity of finishes. 4.6.2

29、Cracking and delamination of components or finishes, or both. 4.6.3 Abnormal nicks, cracks, or scratches on finished surfaces that indicate the removal of the normal protective coating. 5 Detail to be specified The following details shall be specified in the referencing document: 5.1 Test specimen p

30、reparation and mounting, if special 5.2 Test condition letter; (see 4.3.1) 5.3 Cleaning and coating of specimen, if required 5.4 Number of specimens to be tested EIA-364-26C Page 8 5.5 Define test specimens (mated or unmated) 5.6 Acceptance criteria 5.7 Measurements before and after exposure 5.8 Spe

31、cify if the post cleaning in 4.4 is to be done with the specimens in the mated or unmated state 5.9 Specify the mating condition of the specimen during the examination 4.6 6 Test documentation Documentation shall contain the details specified in clause 5, with any exceptions, and the following: 6.1

32、Title of test 6.2 Specimen description including fixture, if applicable 6.3 Test equipment used, and date of last and next calibration 6.4 Test procedure and condition 6.5 Values and observations 6.5.1 Visual examination; see 4.6 6.6 Name of operator and start/finish date(s) of test EIA-364-26C Page

33、 A-1 Annex A Informative A.1 Specimen orientation during exposure As this procedure specifies that the specimen(s) be tested with the engaging axis horizontal, the potential exists for the specimen to collect significant quantities of liquid salt solution on non-draining surfaces. Pools of liquid sa

34、lt solution can unduly corrode the specimen, or cause other performance problems. The specifying party should be cognizant of this possibility and consider doing the following when appropriate: Specify an alternative orientation, or Specifically exclude corrosion or other performance problems that c

35、an occur at a collection site, or Take no action. ECIA Document Improvement Proposal If in the review or use of this document, a potential change is made evident for safety, health or technical reasons, please fill in the appropriate information below and mail or FAX to: Electronic Components Indust

36、ry Association EIA Standards & Technology Department 2214 Rock Hill Rd., Suite 265 Herndon, VA 20170 FAX: (571-323-0245) Document No.: Document Title: Submitters Name: Telephone No.: FAX No.: e-mail: Address: Urgency of Change: Immediate: At next revision: Problem Area: a. Clause Number and /or Draw

37、ing: b. Recommended Changes: c. Reason/Rationale for Recommendation: Additional Remarks: Signature: Date: FOR ECIA USE ONLY Responsible Committee: Chairman: Date comments forwarded to Committee Chairman: Revision History Revision letter Project number Publication date Additions, changes and deletion

38、s - - December 1969 Initially published in EIA RS-364 A SP-1492 February 1993 B SP-3932-A April 1999 B SP-5134-A April 1999 Reaffirmed August 16, 2006 B SP-5252.05 January 2013 Reaffirmed January 28, 2013 C SP-5299 Revised paragraph 4.4, 4.5, 4.6, 5.8 and 6.6 Added paragraph 5.9 Electronic Components Industry Association 2214 Rock Hill Road, Suite 265 * Herndon, VA 20170 * tel 571-323-0294 * fax 571-323-0245 www.eciaonline.org