Electroless Nickel


ENDEP 3 is a low phosphorus electroless nickel which produces a semi-bright to bright finish.

ENDEP 3 is a three part system with a simple two part maintenance.

ENDEP 3 produces a 2 – 4% P coating.

Advantages of ENDEP 3 system.

  • Meets MIL- C-26074D, AMS-2404C and AMS-2405B
  • Can be operated as an ammoniated or non-ammoniated system
  • Wide range of operating parameters
  • Low phosphorus alloy
  • Heat treatable to hardness of chromium
  • Exceptional stability
  • Fast rate of deposition
  • Cadmium and lead free system


Phosphorus Content Range 2 - 4 (wt. %)
Melting Range: 930-1125°C
Colour: Semi-Bright
Hardness (as plated) 625 - 700 HVN
Hardness after heat treated 60 minutes at 400°C
800 – 1,000 HVN

WARRANTY AND DISCLAIMER: This information is based on our experience and is, to the best of our knowledge, true and accurate. MAR-Tech Holdings Inc. gives no warranty, expressed or implied and the products are sold upon condition that the purchasers will make their own tests to determine the quality and suitability of the product. Any information or suggestions are given without warranty of any kind and the purchasers are solely responsible any loss arising from the use of such information.

Solution Make-up:
ENDEP 3 A 6.0% by volume
ENDEP 3 B 15% by volume
Deionized Water To operating volume
  1. Add deionized water to a properly cleaned and passivated EN tank (fill to 1/2 tank capacity).
  2. Add required amounts of ENDEP 3 A followed by ENDEP 3 B using either air or mechanical agitation to ensure proper mixing.
  3. Fill to working volume with deionized water.
  4. Mix thoroughly with solution and/or air Agitation and heat to 180 °F.
  5. Check pH and adjust, to 6.2 if necessary, Lower pH with 25% by volume Sulphuric acid. To raise the pH use with ammonium hydroxide, sodium hydroxide or pH controller solution
Bath Replenishment

To ensure proper operation of the ENDEP 3 system, the solution chemistry must be maintained. This is accomplished by measuring and monitoring the nickel metal concentration via a standard EDTA titration.

The ENDEP SYSTEM is designed to be replenished in a 1:1 of the 3A and 3C.

Upon determination of the nickel metal concentration, additions of both ENDEP 3A and ENDEP 3C or ENDEP 3D are made based on the following calculation and/or replenishment guide.

**IMPORTANT: Do not allow concentration to fall below 5.4 g/l (90% of solution concentration)**

Replenishment Calculation:

To increase the nickel content by 1 g/l, add 10ml of ENDEP 3A per litre to plating solution. The ENDEP 3C is designed to replenish the reducer in the bath. And is used at a 1:1 ratio with ENDEP 6A.

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