Ipcote IP9183-R1 / Ipthin IP9356 / Smoothcote IP9442 / IP9253 sacrificial aluminum coatings for compressor blades and landing gear (MSRR 9140, 9253, 9356)

Country: United Kingdom · Model: IP9183-R1, IP9356, IP9442, IP9253-R2

Sacrificial aluminum coatings for compressor blades, landing gear, fasteners and marine equipment. The base IP9183-R1 at a thickness of 50 µm withstands over 3000 hours in salt spray per ASTM B117. For tight tolerances there is the Ipthin IP9356 with a thickness of 12–25 µm, and a chromium-free variant IP9253-R2.

IP9183-R1 Ipcote: base sacrificial coating; 50 µm gives > 3000 h in salt spray ASTM B117; MSRR 9140, OMAT 7/46B, PCS637, PCS2550, LB598, ITP SMM-903, GE A50TF1 Class E, Safran DMR 74-052, Siemens 552208; Cr(VI) 37 ppm
Ipcote curing: 1 h at 560 °C (matt gray conductive) or 1 h at 350 °C + shot blasting/polishing (bright silver); for sensitive alloys from 260–265 °C with extended hold
Ipthin IP9356: thin-film 12–25 µm for interference fits, flanges, fasteners, dovetails; MSRR 9356, ITP SMM-919, OMAT 7/167A
Smoothcote IP9442: fine-particle Al, smoothness 20–25 µin; alternative to Sermetal 962/5380/5380DP; Cr(VI) 14 ppm

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Technical specifications

Customs codes (for reference)
IP9183-R1 Ipcote	base sacrificial coating; 50 µm gives > 3000 h in salt spray ASTM B117; MSRR 9140, OMAT 7/46B, PCS637, PCS2550, LB598, ITP SMM-903, GE A50TF1 Class E, Safran DMR 74-052, Siemens 552208; Cr(VI) 37 ppm
Ipcote curing	1 h at 560 °C (matt gray conductive) or 1 h at 350 °C + shot blasting/polishing (bright silver); for sensitive alloys from 260–265 °C with extended hold
Ipthin IP9356	thin-film 12–25 µm for interference fits, flanges, fasteners, dovetails; MSRR 9356, ITP SMM-919, OMAT 7/167A
Smoothcote IP9442	fine-particle Al, smoothness 20–25 µin; alternative to Sermetal 962/5380/5380DP; Cr(VI) 14 ppm
IP9253-R2	organic one-component chromium-free; MSRR 9253
Replaces	Sermetal W/WFX, 709/762/962; cadmium on landing gear and fasteners
Processes	RPS 666/1, 666/2, 666/3; IPAS 666
NSN (NATO Stock Number)	8030-99-406-7055 (per the manufacturer's document, to be confirmed by packaging)

Specifications are taken from the manufacturer’s technical documentation. Updated 11/10/2026. Customs codes are for reference only; the final code is determined at customs declaration for the specific model.

Description

The layer on aluminum powder is electrically conductive and protects steel electrochemically, corroding in its place. The IP9183-R1 meets MSRR 9140, OMAT 7/46B, PCS637, PCS2550, LB598, ITP SMM-903, GE A50TF1, Safran DMR 74-052 and Siemens 552208, replaces Sermetal W/WFX, and contains 37 ppm Cr(VI). Curing for 1 hour at 560 °C gives a matt gray conductive film, 1 hour at 350 °C with shot blasting or polishing gives a bright silver look, and for heat-sensitive alloys it can be done from 260 °C with a longer hold. The Ipthin IP9356 per MSRR 9356, ITP SMM-919 and OMAT 7/167A is used on interference fits, flanges, bolts and dovetails, and replaces Sermetal 709, 762 and 962. The Smoothcote IP9442 on a finer powder gives a roughness of 20–25 µin and 14 ppm Cr(VI), an alternative to Sermetal 962, 5380 and 5380DP. The IP9253-R2 is one-component, organic, chromium-free, per MSRR 9253. The processes are described in RPS 666 and IPAS 666, and Ipseal or Smoothseal is applied on top.

How to choose

Ordinary parts are coated with the IP9183-R1, and where tolerances are tight, take the thin IP9356 at 12–25 µm. For a smoother erosion-resistant layer the IP9442 is suitable. If a chromium-free process is needed, there is the IP9253-R2. For sensitive alloys curing is lowered to 260 °C.

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Ipcote IP9183-R1 / Ipthin IP9356 / Smoothcote IP9442 / IP9253 sacrificial aluminum coatings for compressor blades and landing gear (MSRR 9140, 9253, 9356). We reply within one business day.