{"id":4282,"date":"2026-07-15T07:19:26","date_gmt":"2026-07-15T05:19:26","guid":{"rendered":"https:\/\/deltar.it\/nichelatura-chimica-basso-fosforo\/"},"modified":"2026-09-08T11:25:42","modified_gmt":"2026-09-08T09:25:42","slug":"low-phosphorus-electroless-nickel-plating","status":"publish","type":"page","link":"https:\/\/deltar.it\/en\/low-phosphorus-electroless-nickel-plating\/","title":{"rendered":"Low-phosphorus electroless nickel plating (ENP 23)"},"content":{"rendered":"
[vc_row full_width=”stretch_row_content” content_placement=”bottom” full_height=”yes” columns_placement=”bottom” equal_height=”yes” wpex_bg_color=”accent-alt” el_class=”dt-container dt-inner-banner” css=”.vc_custom_1784700718148{background-image: url(https:\/\/deltar.it\/wp-content\/uploads\/2026\/07\/chimica-fosforo-banner.jpg?id=2539) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}” wpex_bg_overlay=”color” wpex_bg_overlay_color=”#00000080″ wpex_bg_overlay_opacity=”1″][vc_column][vc_row_inner content_placement=”bottom” el_class=”pbd100″][vc_column_inner el_class=”fade-up”][vc_column_text css=”” el_class=”dt-label dt-big-label dt-inner-h1″ color=”on-accent” letter_spacing=”10%” font_weight=”700″ text_transform=”uppercase”]\n

Low-phosphorus electroless nickel plating (ENP 23)<\/h1>\n[\/vc_column_text][vc_column_text css=”” el_class=”mtd30 mbd20 mtm20 mbm20 dt-remove-br-md dt-inner-h2″ color=”on-accent”]\n

Hardness and wear
\nresistance for
\nmechanical components<\/h2>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” el_class=”dt-container-w”][vc_column][vc_row_inner content_placement=”top” el_class=”ptd100 pbd100 ptm60 pbm60 dt-about dt-nichelatura-about dt-m-reverse”][vc_column_inner el_class=”fade-up mtm30″ width=”1\/2″]
\"Componenti<\/div><\/figure>[\/vc_column_inner][vc_column_inner el_class=”fade-up” width=”1\/2″][vc_column_text css=”” color=”#222222″ text_transform=”none” el_class=”dt-h2 dt-remove-br-md ptd20″]\n

Low-phosphorus electroless
\nnickel plating<\/h2>\n[\/vc_column_text][vc_column_text css=”” color=”#353639″ font_size=”d:17px|tp:16px” el_class=”ptd20 ptm15 dt-remove-br-md”]The low-phosphorus electroless nickel plating treatment, indicated
\nin the Deltar procedure as ENP 23, is an autocatalytic
\nnickel-phosphorus alloy with a P content between 1% and 4% by weight.
\nIt is the process of choice when the component’s priority is mechanical
\nperformance: high hardness of the \u201cas deposited\u201d deposit, resistance
\nto rubbing wear and dimensional stability over time.
\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” el_class=”dt-sm-container-w” wpex_bg_overlay=”color” wpex_bg_overlay_color=”palette-290″ wpex_bg_overlay_opacity=”80%” css=”.vc_custom_1784095099413{background-image: url(https:\/\/deltar.it\/wp-content\/uploads\/2026\/07\/nichelatura-basso-fos.jpg?id=2458) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}”][vc_column][vc_row_inner el_class=”ptd100 pbd100 ptm60 pbm60″][vc_column_inner el_class=”fade-up mbm30″ width=”1\/2″][vc_column_text css=”” color=”palette-295″ font_size=”clamp(22px, 2vw, 32px);” font_family=”Barlow” font_weight=”700″ el_class=”mbd10 mbm10 dt-title-min-h dt-inner-section-h2″ line_height=”1.15″]\n

Characteristics of the ENP 23 deposit<\/h2>\n[\/vc_column_text][vc_column_text css=”” color=”palette-295″ font_size=”16px”]Unlike high phosphorus, the ENP 23 deposit offers high mechanical
\nperformance already in the \u201cas deposited\u201d condition, i.e. without
\nthe need for subsequent heat treatment:<\/p>\n
    \n
  • High deposit hardness already after deposition<\/li>\n
  • Excellent wear resistance and metal-to-metal contact<\/li>\n
  • Good corrosion resistance in alkaline environments<\/li>\n
  • Corrosion resistance lower than high phosphorus,
    \nbut adequate in non-aggressive environments<\/li>\n
  • Thickness uniformity even on complex geometries,
    \nguaranteed by the autocatalytic process<\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner el_class=”fade-up mbm30″ width=”1\/2″][vc_column_text css=”” color=”palette-295″ font_size=”clamp(22px, 2vw, 32px);” font_family=”Barlow” font_weight=”700″ el_class=”mbd10 mbm10 dt-title-min-h dt-inner-section-h2″ line_height=”1.15″]\n

    When to choose low phosphorus<\/h2>\n[\/vc_column_text][vc_column_text css=”” color=”palette-295″ font_size=”16px”]Low phosphorus is the correct choice when the component must:<\/p>\n
      \n
    • Resist mechanical wear, abrasion and rubbing<\/li>\n
    • Work in dynamic contact with other surfaces
      \n(seats, couplings, threads)<\/li>\n
    • Maintain mechanical performance without
      \nnecessarily resorting to post-deposition heat treatments<\/li>\n<\/ul>\n

      It is not the optimal choice for components intended for strongly
      \ncorrosive environments (aggressive humid, marine, chemical),
      \nwhere high-phosphorus ENP 1012 is preferable.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content”][vc_column][vc_row_inner equal_height=”yes” el_class=”dt-x-full-w”][vc_column_inner el_class=”ptd75 pbd75 ptm60 pbm60″ width=”1\/2″][vc_column_text css=”” el_class=”mbd25 mbm25 fade-up” color=”#171717″]\n

      Typical applications<\/h2>\n[\/vc_column_text][vc_column_text css=”” font_size=”16px” color=”#353639″ el_class=”fade-up” font_weight=”600″]\n
        \n
      • Fluid-power and pneumatic components subject to sliding<\/li>\n
      • Moulds for plastics<\/li>\n
      • Precision mechanical components with dynamic couplings<\/li>\n
      • Replacement parts for hard chrome coatings (a more sustainable alternative)<\/li>\n
      • Components for automotive and extrusion<\/li>\n
      • Components for hydrogen production plants<\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner el_class=”ptd75 pbd75 ptm60 pbm60″ width=”1\/2″][vc_column_text css=”” color=”palette-295″ el_class=”mbd45 mbm45 dt-remove-br-md fade-up”]\n

        The ENP 23 process
        \nat Deltar<\/h2>\n[\/vc_column_text][vc_column_text css=”” font_size=”16px” color=”palette-295″ el_class=”fade-up” font_weight=”600″]The deposition process takes place chemically, without electric current, through an autocatalytic process controlled in every parameter:<\/p>\n
          \n
        • Bath temperature: 85-91 \u00b0C<\/li>\n
        • Bath pH: 4.6-5.2<\/li>\n
        • Nickel concentration: 4.5-6.3 g\/L<\/li>\n
        • Continuous control of the composition with dedicated electronic instrumentation and daily verification by volumetric titration<\/li>\n<\/ul>\n

          The Deltar LS019 procedure complies with the main international standards in the ENP sector: ASTM B117, B183, B322, B499, B571, B578, B602, B636, B656, B689, B733, ISO 4527, MIL-C-26074.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” el_class=”dt-sm-container-w” wpex_bg_color=”#6e6e6e”][vc_column][vc_row_inner el_class=”ptd95 pbd40 ptm60 pbm40″][vc_column_inner el_class=”mbm30 fade-up” width=”1\/2″][vc_column_text css=”” el_class=”dt-remove-br-md” color=”palette-295″]\n

          Post-deposition
          \nheat treatments<\/h2>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner el_class=”fade-up” width=”1\/2″][vc_column_text css=”” color=”palette-295″ font_size=”16px” font_weight=”600″ el_class=”mbd25 mbm25 dt-remove-br-md”]When required, the ENP 23 deposit can be subjected to heat treatment for two purposes:[\/vc_column_text]