Yellow film after rinsing..??

[ozzyman]

Latest Example...Steel Bike frame, Beadblasted and blown off.. Rinsed with HOT WATER... I then pretreat with Columbias' Iron Phosphate using a spray bottle.. Doing this outside with a HOT water hose handy to rinse off the parts... Kinda windy that day so the parts were drying fast..I kept it moist with the phosphate alot...then after the few minutes I rinsed immediatley with hot TAP water... As the wind was drying it I could see yellow film forming in sporadic areas.. I used compressed clean air to blow dry completly = however this yellow film was persistent...
The Tap water is softend..Country water/farm area but NO rotten egg smell..etc..
... Film almost appears to be hard water stain in nature... When dry - I used a white cloth and some of it wiped off onto it....
I have done steel clutch covers and no staining...Not a windy day so the parts had adequate time to Phosphate..etc..
Any ideas...??

[SCOTTRODS]

Latest Example...Steel Bike frame, Beadblasted and blown off.. Rinsed with HOT WATER... I then pretreat with Columbias' Iron Phosphate using a spray bottle.. Doing this outside with a HOT water hose handy to rinse off the parts... Kinda windy that day so the parts were drying fast..I kept it moist with the phosphate alot...then after the few minutes I rinsed immediatley with hot TAP water... As the wind was drying it I could see yellow film forming in sporadic areas.. I used compressed clean air to blow dry completly = however this yellow film was persistent...
The Tap water is softend..Country water/farm area but NO rotten egg smell..etc..
... Film almost appears to be hard water stain in nature... When dry - I used a white cloth and some of it wiped off onto it....
I have done steel clutch covers and no staining...Not a windy day so the parts had adequate time to Phosphate..etc..
Any ideas...??

Possibly Flash Rust. Possibly normal for that particular metal.

Eliminate the windy issue and phosphate in the bathtub,.... see what results you get.

I recently saw a discussion thread on another forum that had the same basic issue. It was called "Normal" bny several of the seasoned guys. Doesn't sound normal to me. Sounds like flash rust.