IS:2384 -1963

Indian Standard

SPECIFICATION FOR TIN ANODES FOR ELECTROPLATING

Metallic Finishes Sectional Committee,, SMDC 23

Chairman

SHRI M. %. KHAN

Members

Representing

Geep Flashlight Industries Ltd., Allahabad

SHRI N. C. BACXXI Government Test House, Calcutta SHRI B. BANERJI Inspection Wing, Directorate General of Supplies

& Disposals (Ministry of Economic & Defence Co-ordination )

SHRI G. D. BHALLA Directorate General of Ordnance Factories ( Minis- try of Defence )

SHRI A. SOUNDRARAJ ( Alternate )

( Bombay)

SHRI V’. KRISHNAN ( Calcutta ) ( Alternate )

SHRI A. K. BHIMANI S. Mitra & Company, Bombay

’ SHRI H. C. SAMPAT ( Alternate )

SHRI A. K. BOSE The Wheel and Rim Company of India Ltd., Madras

SHRI D. K. CHATTERJEE Sen-Raleigh Industries of India Ltd., Calcutta SHRI KANTILAL T. DALAL Kohinoor Electra-Gilders, Bombay

SHRI JAYENDRA K. DALAL ( Alternate ) DR. P. DAYAL Development Wing (Ministry of Commerce and

Industry ), New Delhi SHRI R. P. DESSAI The Metal Box Company of India Ltd., Calcutta

SHRI SUBIR ROY ( Alternate ) SHRI P. N. GANDHI’ Nickel Information Bureau Private Ltd., Bombay GENERAL MANAGER, Directorate General of Posts and Telegraphs

p & T WORXSHOP& CALCUTTA (Ministry of Transport & Communioatio& j DEPUTY GENERAL MANAGER ( AIternate )

DR. B. P. GHOSH Small Industries Service Institute (Ministry of Commerce & Industry ), Ludhiana

SHRI G. N. KESHA~AMURTHY Indian Telephone Industries Ltd., Bangalore PROF. A. A. KRISHNAN Indian Institute of Science, Bangalore

DR. T. L. RAMACHAR ( Alternate ) SHRI B. B. MUKHERJI Jay Engineering Works Ltd., Calcutta SHRI G. MUKHERJI Ministry of Railways

SHRI R. VENICAT RAO ( Alternate ) DR. K. S. RAJA~OPALAN Central Electrochemical Research Institute

( CSIR ), Karaikudi SRRI B. A. SHENOI ( Alternate )

( Continued on page 2 )

INDIAN STANDARDS INSTITUTION

MANAK BHAVAN, 9 MATHURA ROAD

NEW DELHI 1

IS : 2384 - 1963

( Continued from page 1 )

Members

SHRI N. M. RAJU SHRI D. V. REDDI

Representing Hindustan Motors Ltd., Calcutta Directorate of Technical Development ( Army

Headquarters ), New Delhi

SERI R. K. ROXADE Premier Automobiles Ltd., Bombay SHRI P. K. DESHPANDE ( Alternate )

SHRI N. C. Roy Geep Flashlight Industries Ltd., Allahabad SRRI A. S. SANTIAGO Hindustan Aircraft Ltd., Bangalore SHEI D. S. TANDON National Metallurgical Laboratory ,( CSIR ),

Jamshedpur SRRI B. S. KRISHNAMACHAR,

Deputy Director ( 8 & M ) Director, IS1 ( Ex-officio Member )

Secretary SHRI S. L. BALI

Extra Assistant Director ( S & M )

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IS : 2384 - 1963

1. SCOPE

1.1 This standard covers the requirements for tin anodes used for electroplating.

2. CHEMICAL COMPOSITION

2.1 The tin anodes shall contain not less than 99.75 percent of tin.

2.2 The amount of impurities present in tin anodes shall not exceed the limits given below when determined in accordance with the method specified in IS : 1940-1962 Methods of Chemical Analysis of Tin Ingot:

IMPURITY PERCENT

Max

Lead + Antimony + Bismuth + Copper + Arsenic + Iron

Lead

Antimony

Bismuth

Copper

Arsenic

Iron

o-20

O-08

0.08

0.08

0.05

0.05

o-01

Total other impurities 0.05

3. SHAPE AND SIZE

3.1 The anodes shall be in the form of rectangular plates or of oval shape or of any other suitable shape and dimension as agreed to between the purchaser and the supplier.

4. MANUFACTURE, WORKMANSHIP AND FINISH

4.1 The anodes, in their finished condition, shall be free from dirt, foreign matter and surface irregularities.

5. SAMPLING

5.1 Sampling of tin anodes for acceptance purposes shall be as agreed to between the manufacturer and the purchaser. A recommended sampling procedure is given in Appendix A.

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IS:2384 - 1963

6. PACKING ’

6.1 Unless otherwise specified, anodes shall be properly separated according to their sizes and shall be packed in such a manner as to ensure safe transportation to the point of delivery. Wherever practi- cable, not more than one size of anodes shall be packed in a single container.

7. MARKING

7.1 The name, initials or trade-mark of the manufacturer shall be legibly marked near the hooks of the anodes as the lower parts are liable to be consumed in usage.

7.2 Tin anodes may also be marked with the ISI Certification Mark.

NOTP: - The use of the IS1 Certifioation Mark is governed by the provisions of the Indian Standards Institution C Certification Marks ) Act. and the Rules and Regulations made thereunder. Presence of this mark on ‘prod&s covered by an Indian Standard conveys the assurance that they have been produoed to comply with the requirements of that Standard, under a well-defined system of inspection, testing and quality control during production. This system. which is devised and super&sed by IS1 “and operated by-the producer, has the further safeguard that the products as actually marketed are continuously checked by IS1 for conformity to the Standard. Details of conditions, under which a licence for the use of the IS1 Certification Mark may be granted to manufacturers or processors, may he obtained from the Indian Standards Institution.

APPENDIX A

( Chse 5.1 )

SAMPLING PROCEDURE FOR TIN ANODES FOR ELECTROPLATING

A-l. LOT

A-l.1 In any consignment, all the tin anodes of the same type and manufactured under similar conditions of production shall be grouped together to constitute a lot.

A-2. SCALE OF SAMPLING

A-2.1 The number of anodes to be selected at random from the lot shall

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IS :2384- 1963

depend upon its size and shall be as given below:

No. OF ANODESIN No. OF ANODESTO THELOT BE SELECTED

Up to 25 2

26 ,, 50 3

51 ,, 100 4

101 ,) 200 5

201 ,) 300 7

301 and above 10

A-3. DRILLINGS

A-3.1 From each anode selected as in A-2, drillings shall be obtained from not fewer than three widely-spaced positions. These drillings shall be obtained in the manner specified in A-3.2 and drillings from each anode shall be stored separately.

A-3.2 Select, a sharpened twist drill (6 to 10 mm drill should be suitable ) . Thoroughly clean the drill in light petroleum and wipe clean with muslin. Free the anode from any loose impurity by means of a steel wire brush. Bore the holes to approximately 10 percent of the thickness of the anode and discard the drillings therefrom. Place the anode on a clean tinned iron sheet and drill a further 80 percent of the thickness. Collect the drillings thus obtained and transfer to a clean container. If a larger quantity of drillings is required, more holes may be drilled as described above. Before analysing, the drillings should be washed in light petroleum.

A-4. NUMBER OF TESTS

A-4.1 The drillings from each anode selected in accordance with A-2.1 shall be separately tested for requirements mentioned in 2.

A-5. CRITERION OF CONFORMITY

A-5.1 From the test results for each of the characteristics, the average and the range shall be calculated and the lot shall be considered as con- forming to the requirements of this specification if the conditions mentioned below are satisfied for each characteristic:

a) If the maximum limit is specified, then ( average + 0.6 range) , shall be less than or equal to the limit specified.

b) If the minimum limit is specified, then (average - 0.6 range) shall be greater than or equal to the limit specified,

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