If you have the Tin Finish Plasti-Grip (Ring or Spade) Terminal from TE, you may worry about oxidation once you see the part’s surface turn dark in color. Before throwing the terminal out, consider the explanations offered below from a TE plating engineer.
Tin is susceptible to oxidation and turning black or other shades of gray due to multiple conditions:
- vibration against other tin surfaces (fretting corrosion)
- zinc oxidation as it migrates into the tin plating from the brass substrate
- cold storage converts pure tin from the beta allotrope to alpha (tin pest)
- humid and corrosive storage conditions can lead to oxidized tin plating as well
These are well-known phenomena and the dark color will simply be a cosmetic issue, as the small increases in contact resistance will not impact functionality.
Applicable Part Numbers
32944
32945
32947
32948
32949
32950
32951
32952
32953
32957
32958
32959
32960
32961
32981
34090
34140
34141
34142
34143
34144
34145
34146
34147
34148
34149
34150
34151
34152
34154
34157
34158
34159
34160
34161
34162
34163
34164
34168
34173
34821
34822
34823
34824
34825
34826
34827
34835
34837
34852
34853
34854
34855
34856
35349
35451
35492
52041
52042
52043
52045
52263
52264
52265
52266
52267
52289
52291
52350
52453
52454
52455
52463
52464
52465
52474
52475
52856
52947
52948
52949
52950
52951
52955
52956
52957
52961
52962
52963
130014
130054
130098
130102
130126
130417
130568
130677
130678
130699
160136
160171
160212
160213
160292
160293
160294
160296
160300
165004
165008
165010
165012
165017
165019
165035
165405
165406
165407
165408
165410
165412
165414
165416
320263
321518
322249
322307
322310
322313
322315
322316
322395
322834
322994
324083
324165
324169
324170
324172
324560
324581
326819
327043
327735
328516
328527
330518
1-1377173-0
1-1377173-1
1-1377173-2
1-1377173-3
1-1377173-4
1-1377173-5
1-1377173-7
1-1377173-9
1-322249-0
1-322249-1
1-322249-1
1-322249-9
1-322249-9
1-324172-0
1-324172-0
1-324172-0
1-324581-1
1-324581-1
1-330518-1
1-330518-2
1-330518-2
1-34142-1
1-34142-1
1377173-1
1377173-4
1377173-5
1377173-6
1377173-7
1377173-8
1377173-9
1-52042-0
1-52042-0
1-52042-3
1-52266-0
1-52266-0
170535-1
170647-2
170780-1
170784-1
170787-1
170787-2
171509-7
171509-8
171510-5
171512-1
171517-1
171519-1
171519-2
171551-1
171551-2
171552-1
184150-1
1958413-1
2-130014-1
2-130014-1
2-130102-1
2-130126-1
2-1377173-1
2-1377173-2
2-1377173-3
2-1377173-4
2-1377173-6
2-1377173-8
2-160292-1
2-165008-1
2-165008-1
2-165012-0
2-165012-0
2-321518-1
2-321518-1
2-322994-1
2-322994-1
2-324165-1
2-324165-1
2-324165-4
2-324169-1
2-324169-1
2-324170-1
2-324170-1
2-324170-1
2-324184-1
2-324560-1
2-326819-1
2-326819-1
2-327043-1
2-327043-1
2-327735-1
2-327735-1
2-328261-1
2-328516-1
2-328527-1
2-328527-1
2-32944-1
2-32945-1
2-32945-1
2-32947-1
2-32947-1
2-32948-1
2-32948-1
2-32949-1
2-32949-1
2-32950-1
2-32950-1
2-32951-1
2-32951-1
2-32952-1
2-32952-1
2-32953-1
2-32953-1
2-32957-1
2-32957-1
2-32958-1
2-32958-1
2-32959-1
2-32959-1
2-32960-1
2-32960-1
2-32961-1
2-32961-1
2-34140-1
2-34140-1
2-34141-1
2-34141-1
2-34143-1
2-34144-1
2-34144-1
2-34145-1
2-34145-1
2-34146-1
2-34146-1
2-34146-4
2-34146-5
2-34146-5
2-34147-1
2-34147-1
2-34148-1
2-34148-1
2-34148-4
2-34148-4
2-34149-1
2-34149-1
2-34149-3
2-34149-3
2-34150-1
2-34150-1
2-34150-3
2-34150-3
2-34151-1
2-34151-1
2-34151-3
2-34151-3
2-34152-2
2-34152-2
2-34157-1
2-34157-1
2-34158-1
2-34158-1
2-34159-1
2-34159-1
2-34160-1
2-34160-1
2-34160-2
2-34160-3
2-34161-1
2-34161-1
2-34161-2
2-34161-3
2-34161-3
2-34162-1
2-34162-1
2-34162-3
2-34163-1
2-34163-1
2-34164-2
2-34168-1
2-34168-1
2-34173-1
2-34173-1
2-342103-1
2-342103-1
2-342104-1
2-342104-1
2-342143-1
2-342143-1
2-342144-1
2-342144-1
2-342184-1
2-342184-1
2-342185-1
2-342185-1
2-342185-1
2-34823-1
2-34823-1
2-34824-3
2-34824-3
2-34837-4
2-34837-4
2-34852-1
2-34852-1
2-34853-1
2-34853-1
2-34854-1
2-34854-1
2-34855-1
2-34855-1
2-34856-1
2-34856-1
2-34856-5
2-34959-1
2-35349-1
2-35449-1
2-35449-1
2-35451-1
2-35451-1
2-35492-1
2-696289-2
3-1377173-1
3-1377173-2
3-1377173-4
3-1377173-5
3-1377173-7
3-1377173-8
3-1377173-9
322511-1
342101-1
342102-1
342103-1
342104-1
342105-1
342106-1
342117-1
342118-1
342142-1
342143-1
342144-1
342145-1
342156-1
342182-1
342183-1
342184-1
342185-1
342186-1
342197-1
4-1377173-0
5-1377175-4
5-1377175-6
52041-1
52041-3
52041-6
52041-6
52041-7
52041-7
52041-9
52042-1
52042-2
52042-3
52042-4
52042-5
52042-7
52042-7
52042-9
52043-1
52043-2
52043-3
52043-4
52043-4
52043-5
52043-5
52043-7
52043-7
52044-1
52044-2
52044-4
52044-5
52045-1
52045-2
52045-5
52046-1
52262-1
52263-1
52263-2
52263-2
52263-3
52263-3
52263-4
52263-4
52263-5
52264-1
52264-4
52264-4
52264-5
52264-5
52265-3
52265-3
52265-4
52266-1
52266-3
52266-4
52266-9
52267-1
52291-1
52291-4
52291-4
52291-5
52291-5
52453-1
52453-1
52454-1
52454-1
52455-1
52463-1
52463-1
52464-1
52464-1
52465-1
52465-1
52475-1
52475-3
52475-3
52475-3
52856-1
52856-1
52947-1
52947-1
52948-1
52949-1
52949-1
52949-2
52949-3
52949-3
52950-1
52950-1
52950-2
52950-3
52950-3
52951-1
52951-1
52951-3
52951-3
52955-1
52955-1
52955-2
52955-3
52955-3
52956-1
52956-2
52956-3
52956-3
52957-1
52957-1
52957-2
52957-3
52957-3
52961-1
52961-1
52962-1
52962-1
52962-2
52962-3
52962-3
52963-1
52963-1
52963-2
52963-3
52963-4
52963-5
52963-5
53240-1
53240-2
53240-2
53241-1
53241-2
53241-2
53242-1
53242-2
53242-5
53242-6
53242-6
53244-1
53244-2
53244-2
53244-4
53244-4
53245-1
53245-2
53245-2
53245-6
53245-6
53246-1
53246-2
53246-2
53247-1
53247-2
53247-2
53248-1
53248-2
53829-2
53829-2
53874-1
53874-2
53874-2
53943-1
53943-2
53944-1
53945-1
53946-1
53947-1
53949-1
53950-1
53951-1
53953-1
53954-1
53975-1
53977-1
53978-1
53978-2
53980-1
54725-1
54748-1
54753-1
54754-1
54774-1
54774-2
54774-2
54775-1
54775-2
54775-2
54947-1
55621-1
55621-2
55621-2
55654-1
55678-1
55678-2
55678-2
55679-1
55679-2
55679-2
55680-2
55680-2
696047-1
696047-1
696048-1
696049-1
696049-2
696049-2
696050-1
696050-2
696050-2
696050-2
7-52956-1
8-322249-1
8-322994-1
8-324165-1
8-324169-1
8-324172-2
8-324581-2
8-327043-1
8-327735-1
8-328516-1
8-328527-1
8-32947-1
8-32951-1
8-32952-1
8-32953-1
8-32957-1
8-32959-1
8-32960-1
8-32961-1
8-34140-1
8-34141-1
8-34142-1
8-34144-1
8-34145-1
8-34146-1
8-34147-1
8-34148-1
8-34149-1
8-34150-1
8-34151-1
8-34152-1
8-34157-1
8-34158-1
8-34159-1
8-34160-1
8-34161-1
8-34162-1
8-34163-1
8-34173-2
8-34823-2
8-34837-2
8-34852-2
8-34853-1
8-34854-1
8-34855-2
8-34856-2
8-52041-5
8-52265-5
8-52453-1
8-52454-1
8-52455-1
8-52464-1
8-52947-1
8-52948-1
8-52949-1
8-52950-1
8-52951-1
8-52957-1
8-52961-2
8-52962-2
8-53244-1
8-53247-1
8-53978-2
9-1377172-5
9-1377172-6
9-1377172-7
9-1377172-9
9-52956-1
A27302-ND
A27303-ND
A27304-ND
A27308-ND
A28192-ND
A27305-ND
A27307-ND
A09019-ND
A27309-ND
A113460-ND
32958-ND
A27310-ND
A09021-ND
A27312-ND
A27573-ND
A101060-ND
A0954-ND
A0955-ND
A09016-ND
A28199-ND
A0956-ND
A09017-ND
A09018-ND
A27306-ND
A0957-ND
A0958-ND
A0959-ND
A0960-ND
A0961-ND
A122609-ND
A0962-ND
A09020-ND
A0963-ND
A0964-ND
A0965-ND
A0966-ND
A0967-ND
A0968-ND
A28194-ND
A0973-ND
A34821-ND
A34822-ND
34823-ND
A27555-ND
34825-ND
34826-ND
34827-ND
A127609-ND
A09023-ND
A27313-ND
A0969-ND
A0970-ND
A0971-ND
A0972-ND
A32017-ND
35451-ND
A32018-ND
A27530-ND
A127613-ND
52043-ND
52045-ND
A27318-ND
A27326-ND
A27323-ND
A27331-ND
52267-ND
A119648-ND
A27321-ND
A27535-ND
A09027-ND
A09028-ND
A09029-ND
A09030-ND
A09031-ND
A09032-ND
A119647-ND
52475-ND
A09025-ND
A0988-ND
52948-ND
A0989-ND
A0990-ND
A0991-ND
A0992-ND
A0993-ND
A0994-ND
A27577-ND
A27578-ND
A27445-ND
A144737-ND
130054-ND
A127614-ND
130102-ND
A112026-ND
130417-ND
A122529-ND
A122530-ND
130678-ND
130699-ND
A121991-ND
160171-ND
160212-ND
160213-ND
160292-ND
A124517-ND
160294-ND
160296-ND
A123858-ND
A121038-ND
A112591-ND
165010-ND
A122550-ND
165017-ND
A145080-ND
165035-ND
165405-ND
165406-ND
165407-ND
165408-ND
165410-ND
165412-ND
165414-ND
165416-ND
320263-ND
A28193-ND
A0982-ND
A121362-ND
A27557-ND
A27558-ND
322315-ND
A27559-ND
322395-ND
A113450-ND
A0977-ND
324083-ND
A0985-ND
A0983-ND
324170-ND
A0987-ND
A28249-ND
A0986-ND
326819-ND
A27425-ND
A27572-ND
A0984-ND
A27311-ND
330518-ND
A127725-ND
A134662-ND
A134663-ND
A127726-ND
A127727-ND
A134664-ND
A134666-ND
A134668-ND
A27433-ND
A0982TR-ND
A0982CT-ND
A27433TR-ND
A27433CT-ND
A134936TR-ND
A134936CT-ND
A134936DKR-ND
A0986TR-ND
A0986CT-ND
1-330518-1-ND
A28230TR-ND
A28230CT-ND
A28201TR-ND
A28201CT-ND
A135057-ND
A127933-ND
A127934-ND
A135058-ND
A135059-ND
A135060-ND
A135061-ND
A134964TR-ND
A134964CT-ND
1-52042-3-ND
A100420TR-ND
A100420CT-ND
A135194-ND
A135198-ND
A106341-ND
A106343-ND
170787-1-ND
170787-2-ND
171509-7-ND
171509-8-ND
171510-5-ND
A135209-ND
171517-1-ND
A135210-ND
171519-2-ND
A122333-ND
A135212-ND
171552-1-ND
A135342-ND
A135363-ND
A135378TR-ND
A135378CT-ND
2-130102-1-ND
2-130126-1-ND
A128500-ND
A135384-ND
A135385-ND
A135386-ND
A135387-ND
A135389-ND
2-160292-1-ND
A135416TR-ND
A135416CT-ND
A135417TR-ND
A135417CT-ND
A28193TR-ND
A28193CT-ND
A100502TR-ND
A100502CT-ND
A0985TR-ND
A0985CT-ND
2-324165-4-ND
A135537TR-ND
A135537CT-ND
A135538TR-ND
A135538CT-ND
A135538DKR-ND
2-324184-1-ND
A28249TR-ND
A135545TR-ND
A135545CT-ND
A27425TR-ND
A27425CT-ND
A27572TR-ND
A27572CT-ND
2-328261-1-ND
2-328516-1-ND
A28221TR-ND
A28221CT-ND
A135553TR-ND
A27303TR-ND
A27303CT-ND
A27304TR-ND
A27304CT-ND
A27308TR-ND
A27308CT-ND
A28192TR-ND
A28192CT-ND
A27305TR-ND
A27305CT-ND
A27307TR-ND
A27307CT-ND
A09019TR-ND
A09019CT-ND
A27309TR-ND
A27309CT-ND
A135554TR-ND
A135554CT-ND
A135555TR-ND
A135555CT-ND
A27310TR-ND
A27310CT-ND
A09021TR-ND
A09021CT-ND
A100514TR-ND
A100514CT-ND
A135568TR-ND
A135568CT-ND
A0955TR-ND
A0955CT-ND
A28199TR-ND
A0956TR-ND
A0956CT-ND
A09017TR-ND
A09017CT-ND
A28212TR-ND
A28212CT-ND
A135569-ND
A135570TR-ND
A135570CT-ND
A27306TR-ND
A27306CT-ND
A0957TR-ND
A0957CT-ND
A28210TR-ND
A28210CT-ND
A0958TR-ND
A0958CT-ND
A135571TR-ND
A135571CT-ND
A0959TR-ND
A0959CT-ND
A135572TR-ND
A135572CT-ND
A0960TR-ND
A0960CT-ND
A135573TR-ND
A135573CT-ND
A28218TR-ND
A28218CT-ND
A135574TR-ND
A135574CT-ND
A100522TR-ND
A100522CT-ND
A0963TR-ND
A0963CT-ND
A0964TR-ND
A0964CT-ND
A135575-ND
2-34160-3-ND
A0965TR-ND
A0965CT-ND
A135576-ND
A105453TR-ND
A105453CT-ND
A28224TR-ND
A28224CT-ND
2-34162-3-ND
A100523TR-ND
A100523CT-ND
A28225-ND
A28194TR-ND
A28194CT-ND
A28236TR-ND
A28236CT-ND
A135578TR-ND
A135578CT-ND
A135579TR-ND
A135579CT-ND
A135580TR-ND
A135580CT-ND
A135581TR-ND
A135581CT-ND
A135582TR-ND
A135582CT-ND
A135583TR-ND
A135583CT-ND
A135583DKR-ND
A100526TR-ND
A100526CT-ND
A135585TR-ND
A135585CT-ND
A135586TR-ND
A135586CT-ND
A100527TR-ND
A100527CT-ND
A0969TR-ND
A0969CT-ND
A0970TR-ND
A0970CT-ND
A0971TR-ND
A0971CT-ND
A28238TR-ND
A28238CT-ND
2-34856-5-ND
2-34959-1-ND
2-35349-1-ND
A135594TR-ND
A135594CT-ND
A135595TR-ND
A135595CT-ND
2-35492-1-ND
2-696289-2-ND
A135975-ND
A135976-ND
A135977-ND
A135978-ND
A135980-ND
A135981-ND
A135982-ND
A128740-ND
A113462-ND
A136083-ND
A122610-ND
A113463-ND
A136084-ND
A136085-ND
A128755-ND
A128756-ND
A136086-ND
A122611-ND
A113464-ND
A139193-ND
342156-1-ND
A122139-ND
A122836-ND
A136087-ND
A122612-ND
A136088-ND
A136089-ND
A136098-ND
A128842-ND
A136151-ND
A27320-ND
A27319-ND
A100646TR-ND
A100646CT-ND
A27320TR-ND
A27320CT-ND
A27319TR-ND
A27325-ND
A27322-ND
A27324-ND
A27533-ND
A136199-ND
A28246TR-ND
A28246CT-ND
A27324TR-ND
A27329-ND
A27327-ND
A27328-ND
A136200TR-ND
A136200CT-ND
A136201TR-ND
A136201CT-ND
A136202TR-ND
A136202CT-ND
A27538-ND
A27539-ND
A27537-ND
A113818-ND
A27333-ND
A117676-ND
A27540-ND
A128868-ND
A27532-ND
A27317-ND
A27318TR-ND
A27318CT-ND
A28240TR-ND
A28240CT-ND
A136207TR-ND
A136207CT-ND
A136208-ND
A27534-ND
A100651TR-ND
A100651CT-ND
A100652TR-ND
A100652CT-ND
A28244TR-ND
A28244CT-ND
52265-4-ND
A136209-ND
A27330-ND
A27536-ND
52266-9-ND
A27332-ND
A27531-ND
A100879TR-ND
A100879CT-ND
A100653TR-ND
A100653CT-ND
A100654TR-ND
A100654CT-ND
A136216TR-ND
A136216CT-ND
52455-1-ND
A100655TR-ND
A100655CT-ND
A09031TR-ND
A09031CT-ND
A136217TR-ND
A136217CT-ND
52475-1-ND
A136218TR-ND
A136218CT-ND
A136218DKR-ND
A100656TR-ND
A100656CT-ND
A0988TR-ND
A0988CT-ND
52948-1-ND
A0989TR-ND
A0989CT-ND
A136232-ND
A136233TR-ND
A136233CT-ND
A0990TR-ND
A0990CT-ND
A136234-ND
A136235TR-ND
A136235CT-ND
A0991TR-ND
A0991CT-ND
A136236TR-ND
A136236CT-ND
A0992TR-ND
A0992CT-ND
A27575-ND
A100658TR-ND
A100658CT-ND
A0993TR-ND
A136237-ND
A136238TR-ND
A136238CT-ND
A0994TR-ND
A0994CT-ND
52957-2-ND
A100659TR-ND
A100659CT-ND
A27577TR-ND
A27577CT-ND
A136239TR-ND
A136239CT-ND
A136240-ND
A136241TR-ND
A136241CT-ND
A100660TR-ND
A100660CT-ND
A09026-ND
52963-3-ND
A136242-ND
A100661TR-ND
A100661CT-ND
A27440-ND
A27440TR-ND
A27440CT-ND
A27441-ND
A27441TR-ND
A27441CT-ND
A27442-ND
53242-2-ND
A136254-ND
A100664TR-ND
A100664CT-ND
A27443-ND
A100665TR-ND
A100665CT-ND
A136258TR-ND
A136258CT-ND
A27576-ND
A100666TR-ND
A100666CT-ND
A136260TR-ND
A136260CT-ND
A27444-ND
A136261TR-ND
A136261CT-ND
A27541-ND
A100667TR-ND
A100667CT-ND
A136262-ND
A136263TR-ND
A136289TR-ND
A136289CT-ND
A09024-ND
A09024TR-ND
A09024CT-ND
53943-1-ND
53943-2-ND
53944-1-ND
53945-1-ND
53946-1-ND
53947-1-ND
53949-1-ND
53950-1-ND
53951-1-ND
53953-1-ND
A117705-ND
53975-1-ND
53977-1-ND
53978-1-ND
53978-2-ND
53980-1-ND
A124528-ND
A33736-ND
54753-1-ND
A27564-ND
A108226-ND
A27556TR-ND
A27556CT-ND
A139215-ND
A136311TR-ND
A136311CT-ND
54947-1-ND
A28196-ND
A28241TR-ND
A28241CT-ND
A27563-ND
A28195-ND
A28195TR-ND
A28195CT-ND
A28197-ND
A28245TR-ND
A28245CT-ND
A28248TR-ND
A28248CT-ND
A136430TR-ND
A136430CT-ND
696048-1-ND
A136431-ND
A100818TR-ND
A100818CT-ND
A136432-ND
A136433TR-ND
A136433CT-ND
A136433DKR-ND
A136590-ND
8-322249-1-ND
A136719-ND
A136726-ND
A136727-ND
A136728-ND
A136730-ND
A136741-ND
A136743-ND
A136746-ND
A139246-ND
A136752-ND
8-32951-1-ND
8-32952-1-ND
A136753-ND
A129120-ND
8-32959-1-ND
A136754-ND
A136755-ND
8-34140-1-ND
A136780-ND
8-34142-1-ND
8-34144-1-ND
8-34145-1-ND
A136781-ND
8-34147-1-ND
A141496-ND
8-34149-1-ND
A136782-ND
A136783-ND
8-34152-1-ND
A136786-ND
A136787-ND
A136788-ND
8-34160-1-ND
A136789-ND
8-34162-1-ND
A136790-ND
A136793-ND
A136800-ND
8-34837-2-ND
A129124-ND
A141497-ND
8-34854-1-ND
8-34855-2-ND
A136801-ND
A129133-ND
8-52265-5-ND
A136824-ND
8-52454-1-ND
A136825-ND
8-52464-1-ND
A136831-ND
8-52948-1-ND
A136832-ND
A136833-ND
8-52951-1-ND
8-52957-1-ND
A136834-ND
A129135-ND
8-53244-1-ND
8-53247-1-ND
8-53978-2-ND
9-1377172-5-ND
A129154-ND
9-1377172-7-ND
9-1377172-9-ND
9-52956-1-ND