Breathe easy! No registration or passwords -- nothing to hack.
... and no maddening pop-up, sticky, or floating ads :-)

Home /
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989


Looking for a blackening solution


We are manufacturers of high tensile fasteners.We use High Alloy Steels for making these products.All these products are heat treated to achieve the desired mechanical properties.After heat treatment, the blackening compound is used for rust preventive coating as a mixture of water and compound and after the tempering operation the fasteners are dropped into the blackening compound through a conveyor. The ratio of the compound is maintained by measuring the pH level.

We understand that some of our Indian manufacturers of these items are using BLACKER-4929 OF NIPPON GREASE CO. LTD.,JAPAN. We in fact are looking for a blackening compound equivalent to BLACKER-4929 OF NIPPON GREASE.

Presently we are not using any blackening compound instead, achieve BLACK COLOUR by lowering the temperature in the tempering furnace to 160 °C to 170 °C but we are not able to get the optimum colour and surface coating is also not as good as in Taiwanese products.

Hence in order to achieve surface finish and rust preventive coating same as of Taiwanese products.We are looking for a blackening compound equivalent to BLACKER-4929 or superior then it if possible as to what blackening compound they are using . Please help us in this matter and arrange to sent Technical Literature.

Looking forward for your early reply.

With best regards,

Dheeraj Juneja

adv. saify ind youtube

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

Chemicals &
Consult'g, Train'g
& Software

About/Contact    -    Privacy Policy    -    ©1995-2023, Pine Beach, New Jersey, USA