Fengfan CAS 68797-57-9 IZE Electroplating Intermediates For Alkaline Zinc Plating

Product Overview

Fengfan IZE is an imidazole–epichlorohydrin copolymer: a polymeric brightening agent rather than a simple salt, and one of the chemical intermediates that hold a cyanide-free alkaline zinc bath together. Within the additive package it is the basic brightener — the layer that decides how the zinc spreads across a part before anything else adds gloss.

That distinction shows up across the whole plating process. A top brightener changes how a deposit looks; a basic brightener changes where it goes, and the two are charged and adjusted separately. It is also why this product is normally run alongside a top brightener rather than on its own, and why the pairing you choose matters more than the number you start with.

Two kinds of buyer use the same drum. Shops running rack or barrel lines in cyanide-free alkaline zinc electroplating take it as the foundation of a package built around a top brightener. Formulators buy it as a raw component and blend it into brightener concentrates of their own — which is why the specification is written as an assay of the active copolymer rather than as a ready-to-use product.

Alkaline zinc and zinc-alloy baths are the documented field, zinc nickel plating among them, so a line moving from plain zinc into an alloy bath is not starting from scratch with this chemistry. Because the material is alkaline in reaction, it drops into those baths without pulling the pH around.

Specifications

Performance & Deposit Quality

• Uniform thickness around the part. High throwing power means the deposit builds at a similar rate on the far edge of a rack and inside a recess, so fewer parts are sorted out, stripped and re-plated after inspection.
• Brightness where the current is weakest. Dull grey patches on internal faces, shielded areas and the centre of a barrel load are where a basic brightener earns its place. In the process of electroplating those are the areas that fail inspection first, and they are the areas this product holds bright.
• Blister control. Keeping the deposit sound as it builds inhibits blistering — the defect that only reveals itself after passivation or during assembly, when the cost of rework is highest.
• A surface that takes a chromate. Zinc plated with the aid of this product chromates easily, and an even conversion coating is what a repeatable colour match and a consistent salt-spray result rest on.
• A place in an existing package. In metal plating an additive is only worth having if it works with what is already in the tank. This product is compatible with conventional top brighteners, so bringing it in does not mean rebuilding the whole system.
• No shock to the bath. Supplied as an alkaline liquid, it adds to a cyanide-free alkaline zinc bath without dragging the pH out of its working band.

Brightener Balance & Bath Control

1. Keep the top brightener you already run. This product is normally used in combination with top brighteners and its compatibility with conventional top brightener chemistry is good, so bringing it in does not mean replacing what is already in the tank.
2. Start with BPC 48 if you are building from scratch. The pairing with BPC 48 has performed particularly well, and it is the combination we would put in front of a shop moving into cyanide-free alkaline zinc for the first time.
3. Write the baseline down. Bath volume, the current density band you run, and the top brightener ratio in the tank. Without that record you cannot later tell whether a change came from this product or from something else.
4. Charge at 10–100 mg/L. On a bath that already runs a top brightener, start at the low end: a basic brightener is a distribution aid, not a gloss additive, and more is not automatically better.
5. Add it diluted, into circulation. A viscous liquid poured neat into one corner takes time to spread, and the first parts through afterwards will show it.
6. Pull a Hull cell panel across the full current density range before committing the whole tank. A panel is the fastest read on a plating process — dull bands, edge burning and the low-current-density response all land on one plate.
7. Read the band before adjusting anything. In the process of electroplating the current density tells you which component is short: dull at the low end supports the distribution side, dull or burnt at the high end supports the top brightener or to the current itself. Change one at a time.
8. Top up against production. Consumption depends on drag-out, bath temperature and how heavily the line runs, so agree a top-up rate with our technical contact for your line rather than borrowing a number from another shop — and log the charge weight with the panel result so the next run starts from a known point.

Applications

• Rack plating of formed parts. Brackets, housings and pressed steel parts with recesses and shielded faces are where throwing power shows: the inside faces stay plated and bright instead of thin and grey.
• Barrel plating of small components. Fasteners, springs, washers and stamped contacts shift contact position through the cycle, and a basic brightener that distributes evenly compensates for that movement better than a brightener-only package.
• Moving off cyanide. The product is designed for cyanide-free alkaline zinc baths, which is where most electroplating shops facing a cyanide phase-out are heading.
• Alkaline zinc-alloy lines. Zinc-alloy work, zinc nickel plating included, is covered by the same chemistry; send the bath parameters and we will confirm the fit before anything is charged.
• Mixed part families in one bath. A line that runs thin sheet, thick sections and small fittings in the same shift benefits from a distribution-first additive rather than one tuned to a single geometry.
• Brightener formulators. Companies that build concentrates from chemical intermediates buy this material as a raw component and blend it into their own system.

Packing & Storage

The product ships in 25 kg drums. The liquid is viscous and alkaline, so keep the drum closed between draws, store it in a cool, dry place away from direct heat and sunlight, and mark the date it entered the warehouse. A drum that has been standing for a long period should be rolled or stirred before drawing, so what comes out matches what went in.

Decant what the bath needs into a clean, labelled container for the line rather than dragging the shipping drum to the tank, and keep the batch number readable on the drum — that number is what ties the drum to its inspection certificate and to the record of what was charged, when, and with what result. An open drum left standing in a metal plating shop also picks up airborne contamination and moisture, which is the last thing an alkaline zinc bath needs.

In the chemical store, treat it as you would any alkaline liquid: bunded, ventilated, off the floor and away from acids. Flush a spill with plenty of water promptly rather than letting it dry on the floor, and dispose of empty drums through your normal chemical-waste route.

Ordering & Delivery

Technical Support & Model Matching

Choosing the right match is where most sourcing decisions stall. As a trading supplier, we keep one point of contact from first enquiry to after-sales: tell us what you are making and the conditions you work under, and we shortlist the closest matches from our supplier network, compare specifications and arrange samples before you commit to a bulk order. If something does not behave as expected, we work with the supplying partner on the cause and a practical fix, and stay with the case until it is settled. Email, WeChat or WhatsApp enquiries get a reply within 24 hours.

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