Shanghai Autra Precision Surface Treatment Co., Ltd.
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AUTRA Precision Surface Treatment

Chemicals & Products

Electroless nickel and other surface finishing chemicals — view applications and selection points by process category.

Start with electroless nickel and functional coatings; other surface treatment chemicals are grouped into three stages: pretreatment & activation, plating & coating, and post-treatment & rework. Each category page explains uses, selection points and the conditions to confirm.

Special functions & substrates: Ni-P-W for thin-film resistors / Room-temperature electroless nickel

Electroless nickel & functional coatings

Animated cover illustrating a PTFE surface effect; not an actual part photo or performance test image

Electroless Nickel-PTFE | PTFE composite electroless plating

Ni-P/PTFE composite coatings address low-friction and mold-release needs; with a PTFE volume fraction of 30–35 vol%, the reference coefficient of friction is 0.05–0.08. Actual performance is confirmed by counterpart, load, speed and lubrication condition.

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SiC composite electroless nickel product & application data

SiC composite electroless nickel

SiC Ni-P+SiC composite electroless nickel: SiC particles reinforce wear-resistant surfaces. View application directions and operating parameters of the SiC composite process.

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Boron nitride composite coating product & application data

Boron nitride composite coating

Boron nitride Ni-P+BN composite coating: low friction, self-lubricating; compare low-, mid- and high-phosphorus systems and view thickness and performance reference conditions.

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Visual illustration of low-temperature low-phosphorus precision parts; not an actual product photo or performance test image

Low-phosphorus electroless nickel

Low-temperature / ultra-low-phosphorus options and low-phosphorus options are shown in groups, each listing phosphorus content, temperature and plating rate separately.

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Ni-P electroless nickel parts application set; specific phosphorus content is confirmed per process

Mid-phosphorus electroless nickel

Five basic processes and a temperature-adjustable type; view performance, operating conditions and the mid- to high-phosphorus range notes separately.

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High-phosphorus electroless nickel product & application data

High-phosphorus electroless nickel

Four high-phosphorus electroless nickel processes for selection; view coating performance, continuous-production conditions and a separate aluminum-part application case.

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Black nickel: post-plating blackening & direct black deposition product & application data

Black nickel: post-plating blackening & direct black deposition

Compare post-plating blackening and direct black processes; view product videos, light absorption, parameter comparison and application selection.

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Electroless Ni-P-B product & application data

Electroless Ni-P-B plating

Electroless Ni-P-B plating: as-deposited hardness ≥700 HV, combining wear resistance, impact resistance and uniform coatings. View applications and operating parameters.

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Electroless nickel-boron Ni-B product & application data

Electroless nickel-boron Ni-B

Hardness, solderability and applications of nickel-boron, low-boron type parameters and separate bath-life test data.

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Illustration of Ni-P-Co-W mechanical part applications; not proof of performance testing

Ni-P-Co-W

A quaternary Ni-P-Co-W electroless alloy combining high as-plated hardness, wear resistance and sliding properties; learn about lubricated sliding conditions, process parameters and mechanical part applications.

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Concept illustration of thin-film resistor applications; not an actual photo of this product

Ni-P-W for thin-film resistors

Special functional coating · Ni-P-W thin-film resistor system, with reference resistivity of about 120 μΩ·cm; the low-TCR direction is verified by operating temperature range and workpiece conditions.

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Reference photo of alumina ceramic substrate; not an actual photo after plating with this process

Room-temperature electroless nickel

Room-temperature electroless nickel · a neutral Ni-P system for glass, ceramics and earthenware; operating temperature 30–90℃, with plating rates at each temperature listed per the data.

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SURFACE FINISHING

Other surface finishing chemicals

Find chemicals by process step: treat the substrate surface first, then choose a plating or coating process, and finally confirm protection and rework requirements.

View the overview of pre-/post-treatment and surface process agents ↗

Pretreatment & activation

Cleaning, degreasing, activation and metallization preparation for special substrates.

Cleaned machined aluminum alloy housings, steel brackets and a cleaning basket (AI process illustration)AI process illustration

Metal & aluminum alloy pretreatment

Choose degreasing, activation, etching, descaling and zincate treatments for steel, copper and aluminum alloy substrates.

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A plastic housing metallized on the outside, with plastic ribs and snap-fits retained on the inside (AI process illustration)AI process illustration

Plastic surface metallization

Etching, activation and metallization steps leading into plating on plastics.

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Plating & coating

Choose an electroplating or coating system by target coating and subsequent use.

Sleeves, perforated flanges and connecting plates with a uniform copper-colored surface (AI process illustration)AI process illustration

Copper electroplating

Alkaline and acid copper systems for strike/underlayers, coverage, brightness and ductility needs.

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Industrial piston rods and metal rings with a mirror silver-white surface (AI process illustration)AI process illustration

Electrolytic nickel & chrome plating

Decorative nickel, functional electrolytic nickel and decorative or hard chrome processes.

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Terminals and busbar connectors with a matte silver-white tin-plated surface (AI process illustration)AI process illustration

Tin electroplating

Bright, matte and electronic-component tin plating, evaluated by soldering and appearance requirements.

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Gold connector pins and silver-white electrical contacts (AI process illustration)AI process illustration

Gold & silver plating

Choose gold and silver plating by electrical contact, solderability, appearance and precious metal consumption.

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Buckles and sleeves with satin silver-white and dark grey alloy-plated appearance (AI process illustration)AI process illustration

Alloy electroplating

Alloy plating such as tin-cobalt, tin-nickel and copper-tin-zinc, for decorative color and alternative coating evaluation.

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Handles and decorative rings with clear electrocoat protection retaining the brass base color (AI process illustration)AI process illustration

Electrophoretic coating

Clear cathodic electrocoat paint plus supporting dewatering and paint stripping, for decorative and protective evaluation.

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Post-treatment & rework

Post-plating protection, special auxiliaries, stripping and rework.

Copper contacts and silver-white parts for surface polishing and protection (AI process illustration)AI process illustration

Coating post-treatment & special auxiliaries

Auxiliary products for post-plating protection, polishing, impurity control and process support.

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Clean metal plating racks and hooks used to illustrate stripping and rework (AI process illustration)AI process illustration

Stripping & rework

For stripping different coatings such as tin, silver, gold and electrocoat paint.

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